This patch rework max310x driver.
Major changes have been made:
- Prepare driver to support ICs with more than one UART.
- Prepare driver to support work with I2C-bus.
The patch changes almost every function and can not be divided into parts.
Signed-off-by: Alexander Shiyan <shc_work@xxxxxxx>
---
drivers/tty/serial/Kconfig | 4 +-
drivers/tty/serial/max310x.c | 918 +++++++++++++++++-----------------
include/linux/platform_data/max310x.h | 5 +-
3 files changed, 454 insertions(+), 473 deletions(-)
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 5e3d689..25772c1 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -291,9 +291,9 @@ config SERIAL_MAX3100
config SERIAL_MAX310X
bool "MAX310X support"
- depends on SPI
+ depends on SPI_MASTER
select SERIAL_CORE
- select REGMAP_SPI if SPI
+ select REGMAP_SPI if SPI_MASTER
default n
help
This selects support for an advanced UART from Maxim (Dallas).
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 8941e64..4620289 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1,7 +1,7 @@
/*
* Maxim (Dallas) MAX3107/8 serial driver
*
- * Copyright (C) 2012 Alexander Shiyan <shc_work@xxxxxxx>
+ * Copyright (C) 2012-2013 Alexander Shiyan <shc_work@xxxxxxx>
*
* Based on max3100.c, by Christian Pellegrin <chripell@xxxxxxxxxxxx>
* Based on max3110.c, by Feng Tang <feng.tang@xxxxxxxxx>
@@ -17,7 +17,9 @@
/* TODO: MAX14830 support (Quad) */
#include <linux/module.h>
+#include <linux/delay.h>
#include <linux/device.h>
+#include <linux/bitops.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
#include <linux/tty.h>
@@ -25,8 +27,10 @@
#include <linux/regmap.h>
#include <linux/gpio.h>
#include <linux/spi/spi.h>
+
#include <linux/platform_data/max310x.h>
+#define MAX310X_NAME "max310x"
#define MAX310X_MAJOR 204
#define MAX310X_MINOR 209
@@ -37,7 +41,8 @@
#define MAX310X_IRQSTS_REG (0x02) /* IRQ status */
#define MAX310X_LSR_IRQEN_REG (0x03) /* LSR IRQ enable */
#define MAX310X_LSR_IRQSTS_REG (0x04) /* LSR IRQ status */
-#define MAX310X_SPCHR_IRQEN_REG (0x05) /* Special char IRQ enable */
+#define MAX310X_REG_05 (0x05)
+#define MAX310X_SPCHR_IRQEN_REG MAX310X_REG_05 /* Special char IRQ en */
#define MAX310X_SPCHR_IRQSTS_REG (0x06) /* Special char IRQ status */
#define MAX310X_STS_IRQEN_REG (0x07) /* Status IRQ enable */
#define MAX310X_STS_IRQSTS_REG (0x08) /* Status IRQ status */
@@ -63,8 +68,15 @@
#define MAX310X_BRGDIVLSB_REG (0x1c) /* Baud rate divisor LSB */
#define MAX310X_BRGDIVMSB_REG (0x1d) /* Baud rate divisor MSB */
#define MAX310X_CLKSRC_REG (0x1e) /* Clock source */
-/* Only present in MAX3107 */
-#define MAX3107_REVID_REG (0x1f) /* Revision identification */
+#define MAX310X_REG_1F (0x1f)
+
+#define MAX310X_REVID_REG MAX310X_REG_1F /* Revision ID */
+
+#define MAX310X_GLOBALIRQ_REG MAX310X_REG_1F /* Global IRQ (RO) */
+#define MAX310X_GLOBALCMD_REG MAX310X_REG_1F /* Global Command (WO) */
+
+/* Extended registers */
+#define MAX310X_REVID_EXTREG MAX310X_REG_05 /* Revision ID */
/* IRQ register bits */
#define MAX310X_IRQ_LSR_BIT (1 << 0) /* LSR interrupt */
@@ -246,58 +258,139 @@
#define MAX310X_CLKSRC_EXTCLK_BIT (1 << 4) /* External clock enable */
#define MAX310X_CLKSRC_CLK2RTS_BIT (1 << 7) /* Baud clk to RTS pin */
+/* Global commands */
+#define MAX310X_EXTREG_ENBL (0xce)
+#define MAX310X_EXTREG_DSBL (0xcd)
+
/* Misc definitions */
#define MAX310X_FIFO_SIZE (128)
+#define MAX310x_REV_MASK (0xfc)
/* MAX3107 specific */
#define MAX3107_REV_ID (0xa0)
-#define MAX3107_REV_MASK (0xfe)
-
-/* IRQ status bits definitions */
-#define MAX310X_IRQ_TX (MAX310X_IRQ_TXFIFO_BIT | \
- MAX310X_IRQ_TXEMPTY_BIT)
-#define MAX310X_IRQ_RX (MAX310X_IRQ_RXFIFO_BIT | \
- MAX310X_IRQ_RXEMPTY_BIT)
-
-/* Supported chip types */
-enum {
- MAX310X_TYPE_MAX3107 = 3107,
- MAX310X_TYPE_MAX3108 = 3108,
+
+struct max310x_devtype {
+ char name[9];
+ int nr;
+ int (*detect)(struct device *);
+ void (*power)(struct uart_port *, int);
};
-struct max310x_port {
- struct uart_driver uart;
+struct max310x_one {
struct uart_port port;
+ struct work_struct tx_work;
+};
- const char *name;
- int uartclk;
-
- unsigned int nr_gpio;
+struct max310x_port {
+ struct uart_driver uart;
+ struct max310x_devtype *devtype;
+ struct regmap *regmap;
+ struct regmap_config regcfg;
+ struct mutex mutex;
+ struct max310x_pdata *pdata;
+ int gpio_used;
#ifdef CONFIG_GPIOLIB
struct gpio_chip gpio;
#endif
+ struct max310x_one p[0];
+};
- struct regmap *regmap;
- struct regmap_config regcfg;
+static u8 max310x_port_read(struct uart_port *port, u8 reg)
+{
+ struct max310x_port *s = dev_get_drvdata(port->dev);
+ unsigned int val = 0;
- struct workqueue_struct *wq;
- struct work_struct tx_work;
+ regmap_read(s->regmap, port->iobase + reg, &val);
- struct mutex max310x_mutex;
+ return val;
+}
- struct max310x_pdata *pdata;
+static void max310x_port_write(struct uart_port *port, u8 reg, u8 val)
+{
+ struct max310x_port *s = dev_get_drvdata(port->dev);
+
+ regmap_write(s->regmap, port->iobase + reg, val);
+}
+
+static void max310x_port_update(struct uart_port *port, u8 reg, u8 mask, u8 val)
+{
+ struct max310x_port *s = dev_get_drvdata(port->dev);
+
+ regmap_update_bits(s->regmap, port->iobase + reg, mask, val);
+}
+
+static int max3107_detect(struct device *dev)
+{
+ struct max310x_port *s = dev_get_drvdata(dev);
+ unsigned int val = 0;
+ int ret;
+
+ ret = regmap_read(s->regmap, MAX310X_REVID_REG, &val);
+ if (ret)
+ return ret;
+
+ if (((val & MAX310x_REV_MASK) != MAX3107_REV_ID)) {
+ dev_err(dev,
+ "%s ID 0x%02x does not match\n", s->devtype->name, val);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int max3108_detect(struct device *dev)
+{
+ struct max310x_port *s = dev_get_drvdata(dev);
+ unsigned int val = 0;
+ int ret;
+
+ /* MAX3108 have not REV ID register, we just check default value
+ * from clocksource register to make sure everything works.
+ */
+ ret = regmap_read(s->regmap, MAX310X_CLKSRC_REG, &val);
+ if (ret)
+ return ret;
+
+ if (val != (MAX310X_CLKSRC_EXTCLK_BIT | MAX310X_CLKSRC_PLLBYP_BIT)) {
+ dev_err(dev, "%s not present\n", s->devtype->name);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void max310x_power(struct uart_port *port, int on)
+{
+ max310x_port_update(port, MAX310X_MODE1_REG,
+ MAX310X_MODE1_FORCESLEEP_BIT,
+ on ? 0 : MAX310X_MODE1_FORCESLEEP_BIT);
+ if (on)
+ msleep(50);
+}
+
+static const struct max310x_devtype max3107_devtype = {
+ .name = "MAX3107",
+ .nr = 1,
+ .detect = max3107_detect,
+ .power = max310x_power,
};
-static bool max3107_8_reg_writeable(struct device *dev, unsigned int reg)
+static const struct max310x_devtype max3108_devtype = {
+ .name = "MAX3108",
+ .nr = 1,
+ .detect = max3108_detect,
+ .power = max310x_power,
+};
+
+static bool max310x_reg_writeable(struct device *dev, unsigned int reg)
{
- switch (reg) {
+ switch (reg & 0x1f) {
case MAX310X_IRQSTS_REG:
case MAX310X_LSR_IRQSTS_REG:
case MAX310X_SPCHR_IRQSTS_REG:
case MAX310X_STS_IRQSTS_REG:
case MAX310X_TXFIFOLVL_REG:
case MAX310X_RXFIFOLVL_REG:
- case MAX3107_REVID_REG: /* Only available on MAX3107 */
return false;
default:
break;
@@ -308,7 +401,7 @@ static bool max3107_8_reg_writeable(struct device *dev, unsigned int reg)
static bool max310x_reg_volatile(struct device *dev, unsigned int reg)
{
- switch (reg) {
+ switch (reg & 0x1f) {
case MAX310X_RHR_REG:
case MAX310X_IRQSTS_REG:
case MAX310X_LSR_IRQSTS_REG:
@@ -317,6 +410,9 @@ static bool max310x_reg_volatile(struct device *dev, unsigned int reg)
case MAX310X_TXFIFOLVL_REG:
case MAX310X_RXFIFOLVL_REG:
case MAX310X_GPIODATA_REG:
+ case MAX310X_BRGDIVLSB_REG:
+ case MAX310X_REG_05:
+ case MAX310X_REG_1F:
return true;
default:
break;
@@ -327,7 +423,7 @@ static bool max310x_reg_volatile(struct device *dev, unsigned int reg)
static bool max310x_reg_precious(struct device *dev, unsigned int reg)
{
- switch (reg) {
+ switch (reg & 0x1f) {
case MAX310X_RHR_REG:
case MAX310X_IRQSTS_REG:
case MAX310X_SPCHR_IRQSTS_REG:
@@ -340,42 +436,25 @@ static bool max310x_reg_precious(struct device *dev, unsigned int reg)
return false;
}
-static void max310x_set_baud(struct max310x_port *s, int baud)
+static void max310x_set_baud(struct uart_port *port, int baud)
{
- unsigned int mode = 0, div = s->uartclk / baud;
+ unsigned int mode = 0, div = port->uartclk / baud;
if (!(div / 16)) {
/* Mode x2 */
mode = MAX310X_BRGCFG_2XMODE_BIT;
- div = (s->uartclk * 2) / baud;
+ div = (port->uartclk * 2) / baud;
}
if (!(div / 16)) {
/* Mode x4 */
mode = MAX310X_BRGCFG_4XMODE_BIT;
- div = (s->uartclk * 4) / baud;
+ div = (port->uartclk * 4) / baud;
}
- regmap_write(s->regmap, MAX310X_BRGDIVMSB_REG,
- ((div / 16) >> 8) & 0xff);
- regmap_write(s->regmap, MAX310X_BRGDIVLSB_REG, (div / 16) & 0xff);
- regmap_write(s->regmap, MAX310X_BRGCFG_REG, (div % 16) | mode);
-}
-
-static void max310x_wait_pll(struct max310x_port *s)
-{
- int tryes = 1000;
-
- /* Wait for PLL only if crystal is used */
- if (!(s->pdata->driver_flags & MAX310X_EXT_CLK)) {
- unsigned int sts = 0;
-
- while (tryes--) {
- regmap_read(s->regmap, MAX310X_STS_IRQSTS_REG, &sts);
- if (sts & MAX310X_STS_CLKREADY_BIT)
- break;
- }
- }
+ max310x_port_write(port, MAX310X_BRGDIVMSB_REG, (div / 16) >> 8);
+ max310x_port_write(port, MAX310X_BRGDIVLSB_REG, div / 16);
+ max310x_port_write(port, MAX310X_BRGCFG_REG, (div % 16) | mode);
}
static int max310x_update_best_err(unsigned long f, long *besterr)
@@ -449,49 +528,49 @@ static int max310x_set_ref_clk(struct max310x_port *s)
regmap_write(s->regmap, MAX310X_CLKSRC_REG, clksrc);
- if (pllcfg)
- max310x_wait_pll(s);
-
- dev_dbg(s->port.dev, "Reference clock set to %lu Hz\n", bestfreq);
+ /* Wait for crystal */
+ if (pllcfg && !(s->pdata->driver_flags & MAX310X_EXT_CLK))
+ msleep(10);
return (int)bestfreq;
}
-static void max310x_handle_rx(struct max310x_port *s, unsigned int rxlen)
+static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen)
{
- unsigned int sts = 0, ch = 0, flag;
+ unsigned int sts, ch, flag;
- if (unlikely(rxlen >= MAX310X_FIFO_SIZE)) {
- dev_warn(s->port.dev, "Possible RX FIFO overrun %d\n", rxlen);
+ if (unlikely(rxlen >= port->fifosize)) {
+ dev_warn_ratelimited(port->dev,
+ "Port %i: Possible RX FIFO overrun\n",
+ port->line);
+ port->icount.buf_overrun++;
/* Ensure sanity of RX level */
- rxlen = MAX310X_FIFO_SIZE;
+ rxlen = port->fifosize;
}
- dev_dbg(s->port.dev, "RX Len = %u\n", rxlen);
-
while (rxlen--) {
- regmap_read(s->regmap, MAX310X_RHR_REG, &ch);
- regmap_read(s->regmap, MAX310X_LSR_IRQSTS_REG, &sts);
+ ch = max310x_port_read(port, MAX310X_RHR_REG);
+ sts = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG);
sts &= MAX310X_LSR_RXPAR_BIT | MAX310X_LSR_FRERR_BIT |
MAX310X_LSR_RXOVR_BIT | MAX310X_LSR_RXBRK_BIT;
- s->port.icount.rx++;
+ port->icount.rx++;
flag = TTY_NORMAL;
if (unlikely(sts)) {
if (sts & MAX310X_LSR_RXBRK_BIT) {
- s->port.icount.brk++;
- if (uart_handle_break(&s->port))
+ port->icount.brk++;
+ if (uart_handle_break(port))
continue;
} else if (sts & MAX310X_LSR_RXPAR_BIT)
- s->port.icount.parity++;
+ port->icount.parity++;
else if (sts & MAX310X_LSR_FRERR_BIT)
- s->port.icount.frame++;
+ port->icount.frame++;
else if (sts & MAX310X_LSR_RXOVR_BIT)
- s->port.icount.overrun++;
+ port->icount.overrun++;
- sts &= s->port.read_status_mask;
+ sts &= port->read_status_mask;
if (sts & MAX310X_LSR_RXBRK_BIT)
flag = TTY_BREAK;
else if (sts & MAX310X_LSR_RXPAR_BIT)
@@ -502,129 +581,129 @@ static void max310x_handle_rx(struct max310x_port *s, unsigned int rxlen)
flag = TTY_OVERRUN;
}
- if (uart_handle_sysrq_char(s->port, ch))
+ if (uart_handle_sysrq_char(port, ch))
continue;
- if (sts & s->port.ignore_status_mask)
+ if (sts & port->ignore_status_mask)
continue;
- uart_insert_char(&s->port, sts, MAX310X_LSR_RXOVR_BIT,
- ch, flag);
+ uart_insert_char(port, sts, MAX310X_LSR_RXOVR_BIT, ch, flag);
}
- tty_flip_buffer_push(&s->port.state->port);
+ tty_flip_buffer_push(&port->state->port);
}
-static void max310x_handle_tx(struct max310x_port *s)
+static void max310x_handle_tx(struct uart_port *port)
{
- struct circ_buf *xmit = &s->port.state->xmit;
- unsigned int txlen = 0, to_send;
+ struct circ_buf *xmit = &port->state->xmit;
+ unsigned int txlen, to_send;
- if (unlikely(s->port.x_char)) {
- regmap_write(s->regmap, MAX310X_THR_REG, s->port.x_char);
- s->port.icount.tx++;
- s->port.x_char = 0;
+ if (unlikely(port->x_char)) {
+ max310x_port_write(port, MAX310X_THR_REG, port->x_char);
+ port->icount.tx++;
+ port->x_char = 0;
return;
}
- if (uart_circ_empty(xmit) || uart_tx_stopped(&s->port))
+ if (uart_circ_empty(xmit) || uart_tx_stopped(port))
return;
/* Get length of data pending in circular buffer */
to_send = uart_circ_chars_pending(xmit);
if (likely(to_send)) {
/* Limit to size of TX FIFO */
- regmap_read(s->regmap, MAX310X_TXFIFOLVL_REG, &txlen);
- txlen = MAX310X_FIFO_SIZE - txlen;
+ txlen = max310x_port_read(port, MAX310X_TXFIFOLVL_REG);
+ txlen = port->fifosize - txlen;
to_send = (to_send > txlen) ? txlen : to_send;
- dev_dbg(s->port.dev, "TX Len = %u\n", to_send);
-
/* Add data to send */
- s->port.icount.tx += to_send;
+ port->icount.tx += to_send;
while (to_send--) {
- regmap_write(s->regmap, MAX310X_THR_REG,
- xmit->buf[xmit->tail]);
+ max310x_port_write(port, MAX310X_THR_REG,
+ xmit->buf[xmit->tail]);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
};
}
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(&s->port);
+ uart_write_wakeup(port);
}
-static irqreturn_t max310x_ist(int irq, void *dev_id)
+static void max310x_port_irq(struct max310x_port *s, int portno)
{
- struct max310x_port *s = (struct max310x_port *)dev_id;
- unsigned int ists = 0, lsr = 0, rxlen = 0;
+ struct uart_port *port = &s->p[portno].port;
- mutex_lock(&s->max310x_mutex);
+ do {
+ unsigned int ists, lsr, rxlen;
- for (;;) {
/* Read IRQ status & RX FIFO level */
- regmap_read(s->regmap, MAX310X_IRQSTS_REG, &ists);
- regmap_read(s->regmap, MAX310X_LSR_IRQSTS_REG, &lsr);
- regmap_read(s->regmap, MAX310X_RXFIFOLVL_REG, &rxlen);
- if (!ists && !(lsr & MAX310X_LSR_RXTO_BIT) && !rxlen)
+ ists = max310x_port_read(port, MAX310X_IRQSTS_REG);
+ rxlen = max310x_port_read(port, MAX310X_RXFIFOLVL_REG);
+ if (!ists && !rxlen)
break;
- dev_dbg(s->port.dev, "IRQ status: 0x%02x\n", ists);
-
- if (rxlen)
- max310x_handle_rx(s, rxlen);
- if (ists & MAX310X_IRQ_TX)
- max310x_handle_tx(s);
- if (ists & MAX310X_IRQ_CTS_BIT)
- uart_handle_cts_change(&s->port,
+ if (ists & MAX310X_IRQ_CTS_BIT) {
+ lsr = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG);
+ uart_handle_cts_change(port,
!!(lsr & MAX310X_LSR_CTS_BIT));
- }
+ }
+ if (rxlen)
+ max310x_handle_rx(port, rxlen);
+ if (ists & MAX310X_IRQ_TXEMPTY_BIT) {
+ mutex_lock(&s->mutex);
+ max310x_handle_tx(port);
+ mutex_unlock(&s->mutex);
+ }
+ } while (1);
+}
- mutex_unlock(&s->max310x_mutex);
+static irqreturn_t max310x_ist(int irq, void *dev_id)
+{
+ struct max310x_port *s = (struct max310x_port *)dev_id;
+
+ if (s->uart.nr > 1) {
+ do {
+ unsigned int val = ~0;
+
+ WARN_ON_ONCE(regmap_read(s->regmap,
+ MAX310X_GLOBALIRQ_REG, &val));
+ val = ((1 << s->uart.nr) - 1) & ~val;
+ if (!val)
+ break;
+ max310x_port_irq(s, fls(val) - 1);
+ } while (1);
+ } else
+ max310x_port_irq(s, 0);
return IRQ_HANDLED;
}
static void max310x_wq_proc(struct work_struct *ws)
{
- struct max310x_port *s = container_of(ws, struct max310x_port, tx_work);
+ struct max310x_one *one = container_of(ws, struct max310x_one, tx_work);
+ struct max310x_port *s = dev_get_drvdata(one->port.dev);
- mutex_lock(&s->max310x_mutex);
- max310x_handle_tx(s);
- mutex_unlock(&s->max310x_mutex);
+ mutex_lock(&s->mutex);
+ max310x_handle_tx(&one->port);
+ mutex_unlock(&s->mutex);
}
static void max310x_start_tx(struct uart_port *port)
{
- struct max310x_port *s = container_of(port, struct max310x_port, port);
+ struct max310x_one *one = container_of(port, struct max310x_one, port);
- queue_work(s->wq, &s->tx_work);
-}
-
-static void max310x_stop_tx(struct uart_port *port)
-{
- /* Do nothing */
-}
-
-static void max310x_stop_rx(struct uart_port *port)
-{
- /* Do nothing */
+ if (!work_pending(&one->tx_work))
+ schedule_work(&one->tx_work);
}
static unsigned int max310x_tx_empty(struct uart_port *port)
{
- unsigned int val = 0;
- struct max310x_port *s = container_of(port, struct max310x_port, port);
-
- mutex_lock(&s->max310x_mutex);
- regmap_read(s->regmap, MAX310X_TXFIFOLVL_REG, &val);
- mutex_unlock(&s->max310x_mutex);
+ unsigned int lvl, sts;
- return val ? 0 : TIOCSER_TEMT;
-}
+ lvl = max310x_port_read(port, MAX310X_TXFIFOLVL_REG);
+ sts = max310x_port_read(port, MAX310X_IRQSTS_REG);
-static void max310x_enable_ms(struct uart_port *port)
-{
- /* Modem status not supported */
+ return ((sts & MAX310X_IRQ_TXEMPTY_BIT) && !lvl) ? TIOCSER_TEMT : 0;
}
static unsigned int max310x_get_mctrl(struct uart_port *port)
@@ -644,28 +723,20 @@ static void max310x_set_mctrl(struct uart_port *port, unsigned int mctrl)
static void max310x_break_ctl(struct uart_port *port, int break_state)
{
- struct max310x_port *s = container_of(port, struct max310x_port, port);
-
- mutex_lock(&s->max310x_mutex);
- regmap_update_bits(s->regmap, MAX310X_LCR_REG,
- MAX310X_LCR_TXBREAK_BIT,
- break_state ? MAX310X_LCR_TXBREAK_BIT : 0);
- mutex_unlock(&s->max310x_mutex);
+ max310x_port_update(port, MAX310X_LCR_REG,
+ MAX310X_LCR_TXBREAK_BIT,
+ break_state ? MAX310X_LCR_TXBREAK_BIT : 0);
}
static void max310x_set_termios(struct uart_port *port,
struct ktermios *termios,
struct ktermios *old)
{
- struct max310x_port *s = container_of(port, struct max310x_port, port);
unsigned int lcr, flow = 0;
int baud;
- mutex_lock(&s->max310x_mutex);
-
/* Mask termios capabilities we don't support */
termios->c_cflag &= ~CMSPAR;
- termios->c_iflag &= ~IXANY;
/* Word size */
switch (termios->c_cflag & CSIZE) {
@@ -696,7 +767,7 @@ static void max310x_set_termios(struct uart_port *port,
lcr |= MAX310X_LCR_STOPLEN_BIT; /* 2 stops */
/* Update LCR register */
- regmap_write(s->regmap, MAX310X_LCR_REG, lcr);
+ max310x_port_write(port, MAX310X_LCR_REG, lcr);
/* Set read status mask */
port->read_status_mask = MAX310X_LSR_RXOVR_BIT;
@@ -717,8 +788,8 @@ static void max310x_set_termios(struct uart_port *port,
MAX310X_LSR_RXBRK_BIT;
/* Configure flow control */
- regmap_write(s->regmap, MAX310X_XON1_REG, termios->c_cc[VSTART]);
- regmap_write(s->regmap, MAX310X_XOFF1_REG, termios->c_cc[VSTOP]);
+ max310x_port_write(port, MAX310X_XON1_REG, termios->c_cc[VSTART]);
+ max310x_port_write(port, MAX310X_XOFF1_REG, termios->c_cc[VSTOP]);
if (termios->c_cflag & CRTSCTS)
flow |= MAX310X_FLOWCTRL_AUTOCTS_BIT |
MAX310X_FLOWCTRL_AUTORTS_BIT;
@@ -728,7 +799,7 @@ static void max310x_set_termios(struct uart_port *port,
if (termios->c_iflag & IXOFF)
flow |= MAX310X_FLOWCTRL_SWFLOW1_BIT |
MAX310X_FLOWCTRL_SWFLOWEN_BIT;
- regmap_write(s->regmap, MAX310X_FLOWCTRL_REG, flow);
+ max310x_port_write(port, MAX310X_FLOWCTRL_REG, flow);
/* Get baud rate generator configuration */
baud = uart_get_baud_rate(port, termios, old,
@@ -736,36 +807,30 @@ static void max310x_set_termios(struct uart_port *port,
port->uartclk / 4);
/* Setup baudrate generator */
- max310x_set_baud(s, baud);
+ max310x_set_baud(port, baud);
/* Update timeout according to new baud rate */
uart_update_timeout(port, termios->c_cflag, baud);
-
- mutex_unlock(&s->max310x_mutex);
}
static int max310x_startup(struct uart_port *port)
{
unsigned int val, line = port->line;
- struct max310x_port *s = container_of(port, struct max310x_port, port);
+ struct max310x_port *s = dev_get_drvdata(port->dev);
- if (s->pdata->suspend)
- s->pdata->suspend(0);
-
- mutex_lock(&s->max310x_mutex);
+ s->devtype->power(port, 1);
/* Configure baud rate, 9600 as default */
- max310x_set_baud(s, 9600);
+ max310x_set_baud(port, 9600);
/* Configure LCR register, 8N1 mode by default */
- val = MAX310X_LCR_WORD_LEN_8;
- regmap_write(s->regmap, MAX310X_LCR_REG, val);
+ max310x_port_write(port, MAX310X_LCR_REG, MAX310X_LCR_WORD_LEN_8);
/* Configure MODE1 register */
- regmap_update_bits(s->regmap, MAX310X_MODE1_REG,
- MAX310X_MODE1_TRNSCVCTRL_BIT,
- (s->pdata->uart_flags[line] & MAX310X_AUTO_DIR_CTRL)
- ? MAX310X_MODE1_TRNSCVCTRL_BIT : 0);
+ max310x_port_update(port, MAX310X_MODE1_REG,
+ MAX310X_MODE1_TRNSCVCTRL_BIT,
+ (s->pdata->uart_flags[line] & MAX310X_AUTO_DIR_CTRL)
+ ? MAX310X_MODE1_TRNSCVCTRL_BIT : 0);
/* Configure MODE2 register */
val = MAX310X_MODE2_RXEMPTINV_BIT;
@@ -776,63 +841,40 @@ static int max310x_startup(struct uart_port *port)
/* Reset FIFOs */
val |= MAX310X_MODE2_FIFORST_BIT;
- regmap_write(s->regmap, MAX310X_MODE2_REG, val);
-
- /* Configure FIFO trigger level register */
- /* RX FIFO trigger for 16 words, TX FIFO trigger for 64 words */
- val = MAX310X_FIFOTRIGLVL_RX(16) | MAX310X_FIFOTRIGLVL_TX(64);
- regmap_write(s->regmap, MAX310X_FIFOTRIGLVL_REG, val);
+ max310x_port_write(port, MAX310X_MODE2_REG, val);
+ max310x_port_update(port, MAX310X_MODE2_REG,
+ MAX310X_MODE2_FIFORST_BIT, 0);
/* Configure flow control levels */
/* Flow control halt level 96, resume level 48 */
- val = MAX310X_FLOWLVL_RES(48) | MAX310X_FLOWLVL_HALT(96);
- regmap_write(s->regmap, MAX310X_FLOWLVL_REG, val);
-
- /* Clear timeout register */
- regmap_write(s->regmap, MAX310X_RXTO_REG, 0);
-
- /* Configure LSR interrupt enable register */
- /* Enable RX timeout interrupt */
- val = MAX310X_LSR_RXTO_BIT;
- regmap_write(s->regmap, MAX310X_LSR_IRQEN_REG, val);
+ max310x_port_write(port, MAX310X_FLOWLVL_REG,
+ MAX310X_FLOWLVL_RES(48) | MAX310X_FLOWLVL_HALT(96));
- /* Clear FIFO reset */
- regmap_update_bits(s->regmap, MAX310X_MODE2_REG,
- MAX310X_MODE2_FIFORST_BIT, 0);
+ /* Clear IRQ status register */
+ max310x_port_read(port, MAX310X_IRQSTS_REG);
- /* Clear IRQ status register by reading it */
- regmap_read(s->regmap, MAX310X_IRQSTS_REG, &val);
-
- /* Configure interrupt enable register */
- /* Enable CTS change interrupt */
- val = MAX310X_IRQ_CTS_BIT;
- /* Enable RX, TX interrupts */
- val |= MAX310X_IRQ_RX | MAX310X_IRQ_TX;
- regmap_write(s->regmap, MAX310X_IRQEN_REG, val);
-
- mutex_unlock(&s->max310x_mutex);
+ /* Enable RX, TX, CTS change interrupts */
+ val = MAX310X_IRQ_RXEMPTY_BIT | MAX310X_IRQ_TXEMPTY_BIT;
+ max310x_port_write(port, MAX310X_IRQEN_REG, val | MAX310X_IRQ_CTS_BIT);
return 0;
}
static void max310x_shutdown(struct uart_port *port)
{
- struct max310x_port *s = container_of(port, struct max310x_port, port);
+ struct max310x_port *s = dev_get_drvdata(port->dev);
/* Disable all interrupts */
- mutex_lock(&s->max310x_mutex);
- regmap_write(s->regmap, MAX310X_IRQEN_REG, 0);
- mutex_unlock(&s->max310x_mutex);
+ max310x_port_write(port, MAX310X_IRQEN_REG, 0);
- if (s->pdata->suspend)
- s->pdata->suspend(1);
+ s->devtype->power(port, 0);
}
static const char *max310x_type(struct uart_port *port)
{
- struct max310x_port *s = container_of(port, struct max310x_port, port);
+ struct max310x_port *s = dev_get_drvdata(port->dev);
- return (port->type == PORT_MAX310X) ? s->name : NULL;
+ return (port->type == PORT_MAX310X) ? s->devtype->name : NULL;
}
static int max310x_request_port(struct uart_port *port)
@@ -841,134 +883,100 @@ static int max310x_request_port(struct uart_port *port)
return 0;
}
-static void max310x_release_port(struct uart_port *port)
-{
- /* Do nothing */
-}
-
static void max310x_config_port(struct uart_port *port, int flags)
{
if (flags & UART_CONFIG_TYPE)
port->type = PORT_MAX310X;
}
-static int max310x_verify_port(struct uart_port *port, struct serial_struct *ser)
+static int max310x_verify_port(struct uart_port *port, struct serial_struct *s)
{
- if ((ser->type == PORT_UNKNOWN) || (ser->type == PORT_MAX310X))
- return 0;
- if (ser->irq == port->irq)
- return 0;
+ if ((s->type != PORT_UNKNOWN) && (s->type != PORT_MAX310X))
+ return -EINVAL;
+ if (s->irq != port->irq)
+ return -EINVAL;
- return -EINVAL;
+ return 0;
}
-static struct uart_ops max310x_ops = {
+static void max310x_null_void(struct uart_port *port)
+{
+ /* Do nothing */
+}
+
+static const struct uart_ops max310x_ops = {
.tx_empty = max310x_tx_empty,
.set_mctrl = max310x_set_mctrl,
.get_mctrl = max310x_get_mctrl,
- .stop_tx = max310x_stop_tx,
+ .stop_tx = max310x_null_void,
.start_tx = max310x_start_tx,
- .stop_rx = max310x_stop_rx,
- .enable_ms = max310x_enable_ms,
+ .stop_rx = max310x_null_void,
+ .enable_ms = max310x_null_void,
.break_ctl = max310x_break_ctl,
.startup = max310x_startup,
.shutdown = max310x_shutdown,
.set_termios = max310x_set_termios,
.type = max310x_type,
.request_port = max310x_request_port,
- .release_port = max310x_release_port,
+ .release_port = max310x_null_void,
.config_port = max310x_config_port,
.verify_port = max310x_verify_port,
};
-#ifdef CONFIG_PM_SLEEP
-
-static int max310x_suspend(struct device *dev)
+static int __maybe_unused max310x_suspend(struct spi_device *spi,
+ pm_message_t state)
{
- int ret;
- struct max310x_port *s = dev_get_drvdata(dev);
-
- dev_dbg(dev, "Suspend\n");
+ struct max310x_port *s = dev_get_drvdata(&spi->dev);
+ int i;
- ret = uart_suspend_port(&s->uart, &s->port);
-
- mutex_lock(&s->max310x_mutex);
-
- /* Enable sleep mode */
- regmap_update_bits(s->regmap, MAX310X_MODE1_REG,
- MAX310X_MODE1_FORCESLEEP_BIT,
- MAX310X_MODE1_FORCESLEEP_BIT);
-
- mutex_unlock(&s->max310x_mutex);
-
- if (s->pdata->suspend)
- s->pdata->suspend(1);
+ for (i = 0; i < s->uart.nr; i++) {
+ uart_suspend_port(&s->uart, &s->p[i].port);
+ s->devtype->power(&s->p[i].port, 0);
+ }
- return ret;
+ return 0;
}
-static int max310x_resume(struct device *dev)
+static int __maybe_unused max310x_resume(struct spi_device *spi)
{
- struct max310x_port *s = dev_get_drvdata(dev);
-
- dev_dbg(dev, "Resume\n");
-
- if (s->pdata->suspend)
- s->pdata->suspend(0);
-
- mutex_lock(&s->max310x_mutex);
+ struct max310x_port *s = dev_get_drvdata(&spi->dev);
+ int i;
- /* Disable sleep mode */
- regmap_update_bits(s->regmap, MAX310X_MODE1_REG,
- MAX310X_MODE1_FORCESLEEP_BIT,
- 0);
-
- max310x_wait_pll(s);
-
- mutex_unlock(&s->max310x_mutex);
+ for (i = 0; i < s->uart.nr; i++) {
+ s->devtype->power(&s->p[i].port, 1);
+ uart_resume_port(&s->uart, &s->p[i].port);
+ }
- return uart_resume_port(&s->uart, &s->port);
+ return 0;
}
-static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume);
-#define MAX310X_PM_OPS (&max310x_pm_ops)
-
-#else
-#define MAX310X_PM_OPS NULL
-#endif
-
#ifdef CONFIG_GPIOLIB
static int max310x_gpio_get(struct gpio_chip *chip, unsigned offset)
{
- unsigned int val = 0;
+ unsigned int val;
struct max310x_port *s = container_of(chip, struct max310x_port, gpio);
+ struct uart_port *port = &s->p[offset / 4].port;
- mutex_lock(&s->max310x_mutex);
- regmap_read(s->regmap, MAX310X_GPIODATA_REG, &val);
- mutex_unlock(&s->max310x_mutex);
+ val = max310x_port_read(port, MAX310X_GPIODATA_REG);
- return !!((val >> 4) & (1 << offset));
+ return !!((val >> 4) & (1 << (offset % 4)));
}
static void max310x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct max310x_port *s = container_of(chip, struct max310x_port, gpio);
+ struct uart_port *port = &s->p[offset / 4].port;
- mutex_lock(&s->max310x_mutex);
- regmap_update_bits(s->regmap, MAX310X_GPIODATA_REG, 1 << offset, value ?
- 1 << offset : 0);
- mutex_unlock(&s->max310x_mutex);
+ max310x_port_update(port, MAX310X_GPIODATA_REG, 1 << (offset % 4),
+ value ? 1 << (offset % 4) : 0);
}
static int max310x_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
struct max310x_port *s = container_of(chip, struct max310x_port, gpio);
+ struct uart_port *port = &s->p[offset / 4].port;
- mutex_lock(&s->max310x_mutex);
-
- regmap_update_bits(s->regmap, MAX310X_GPIOCFG_REG, 1 << offset, 0);
-
- mutex_unlock(&s->max310x_mutex);
+ max310x_port_update(port, MAX310X_GPIOCFG_REG, 1 << (offset % 4), 0);
return 0;
}
@@ -977,74 +985,42 @@ static int max310x_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
struct max310x_port *s = container_of(chip, struct max310x_port, gpio);
+ struct uart_port *port = &s->p[offset / 4].port;
- mutex_lock(&s->max310x_mutex);
-
- regmap_update_bits(s->regmap, MAX310X_GPIOCFG_REG, 1 << offset,
- 1 << offset);
- regmap_update_bits(s->regmap, MAX310X_GPIODATA_REG, 1 << offset, value ?
- 1 << offset : 0);
-
- mutex_unlock(&s->max310x_mutex);
+ max310x_port_update(port, MAX310X_GPIODATA_REG, 1 << (offset % 4),
+ value ? 1 << (offset % 4) : 0);
+ max310x_port_update(port, MAX310X_GPIOCFG_REG, 1 << (offset % 4),
+ 1 << (offset % 4));
return 0;
}
#endif
-/* Generic platform data */
-static struct max310x_pdata generic_plat_data = {
- .driver_flags = MAX310X_EXT_CLK,
- .uart_flags[0] = MAX310X_ECHO_SUPRESS,
- .frequency = 26000000,
-};
-
-static int max310x_probe(struct spi_device *spi)
+static int max310x_probe(struct device *dev, int is_spi,
+ struct max310x_devtype *devtype, int irq)
{
struct max310x_port *s;
- struct device *dev = &spi->dev;
- int chiptype = spi_get_device_id(spi)->driver_data;
- struct max310x_pdata *pdata = dev->platform_data;
- unsigned int val = 0;
- int ret;
+ struct max310x_pdata *pdata = dev_get_platdata(dev);
+ int i, ret, uartclk;
/* Check for IRQ */
- if (spi->irq <= 0) {
+ if (irq <= 0) {
dev_err(dev, "No IRQ specified\n");
return -ENOTSUPP;
}
+ if (!pdata) {
+ dev_err(dev, "No platform data supplied\n");
+ return -EINVAL;
+ }
+
/* Alloc port structure */
- s = devm_kzalloc(dev, sizeof(struct max310x_port), GFP_KERNEL);
+ s = devm_kzalloc(dev, sizeof(*s) +
+ sizeof(struct max310x_one) * devtype->nr, GFP_KERNEL);
if (!s) {
dev_err(dev, "Error allocating port structure\n");
return -ENOMEM;
}
- dev_set_drvdata(dev, s);
-
- if (!pdata) {
- dev_warn(dev, "No platform data supplied, using defaults\n");
- pdata = &generic_plat_data;
- }
- s->pdata = pdata;
-
- /* Individual chip settings */
- switch (chiptype) {
- case MAX310X_TYPE_MAX3107:
- s->name = "MAX3107";
- s->nr_gpio = 4;
- s->uart.nr = 1;
- s->regcfg.max_register = 0x1f;
- break;
- case MAX310X_TYPE_MAX3108:
- s->name = "MAX3108";
- s->nr_gpio = 4;
- s->uart.nr = 1;
- s->regcfg.max_register = 0x1e;
- break;
- default:
- dev_err(dev, "Unsupported chip type %i\n", chiptype);
- return -ENOTSUPP;
- }
/* Check input frequency */
if ((pdata->driver_flags & MAX310X_EXT_CLK) &&
@@ -1055,13 +1031,11 @@ static int max310x_probe(struct spi_device *spi)
((pdata->frequency < 1000000) || (pdata->frequency > 4000000)))
goto err_freq;
- mutex_init(&s->max310x_mutex);
+ s->pdata = pdata;
+ s->devtype = devtype;
+ dev_set_drvdata(dev, s);
- /* Setup SPI bus */
- spi->mode = SPI_MODE_0;
- spi->bits_per_word = 8;
- spi->max_speed_hz = 26000000;
- spi_setup(spi);
+ mutex_init(&s->mutex);
/* Setup regmap */
s->regcfg.reg_bits = 8;
@@ -1069,109 +1043,100 @@ static int max310x_probe(struct spi_device *spi)
s->regcfg.read_flag_mask = 0x00;
s->regcfg.write_flag_mask = 0x80;
s->regcfg.cache_type = REGCACHE_RBTREE;
- s->regcfg.writeable_reg = max3107_8_reg_writeable;
+ s->regcfg.writeable_reg = max310x_reg_writeable;
s->regcfg.volatile_reg = max310x_reg_volatile;
s->regcfg.precious_reg = max310x_reg_precious;
- s->regmap = devm_regmap_init_spi(spi, &s->regcfg);
+ s->regcfg.max_register = devtype->nr * 0x20 - 1;
+
+ if (IS_ENABLED(CONFIG_SPI_MASTER) && is_spi) {
+ struct spi_device *spi = to_spi_device(dev);
+
+ s->regmap = devm_regmap_init_spi(spi, &s->regcfg);
+ } else
+ return -ENOTSUPP;
+
if (IS_ERR(s->regmap)) {
- ret = PTR_ERR(s->regmap);
dev_err(dev, "Failed to initialize register map\n");
- goto err_out;
- }
-
- /* Reset chip & check SPI function */
- ret = regmap_write(s->regmap, MAX310X_MODE2_REG, MAX310X_MODE2_RST_BIT);
- if (ret) {
- dev_err(dev, "SPI transfer failed\n");
- goto err_out;
- }
- /* Clear chip reset */
- regmap_write(s->regmap, MAX310X_MODE2_REG, 0);
-
- switch (chiptype) {
- case MAX310X_TYPE_MAX3107:
- /* Check REV ID to ensure we are talking to what we expect */
- regmap_read(s->regmap, MAX3107_REVID_REG, &val);
- if (((val & MAX3107_REV_MASK) != MAX3107_REV_ID)) {
- dev_err(dev, "%s ID 0x%02x does not match\n",
- s->name, val);
- ret = -ENODEV;
- goto err_out;
- }
- break;
- case MAX310X_TYPE_MAX3108:
- /* MAX3108 have not REV ID register, we just check default value
- * from clocksource register to make sure everything works.
- */
- regmap_read(s->regmap, MAX310X_CLKSRC_REG, &val);
- if (val != (MAX310X_CLKSRC_EXTCLK_BIT |
- MAX310X_CLKSRC_PLLBYP_BIT)) {
- dev_err(dev, "%s not present\n", s->name);
- ret = -ENODEV;
- goto err_out;
- }
- break;
+ return PTR_ERR(s->regmap);
}
/* Board specific configure */
- if (pdata->init)
- pdata->init();
- if (pdata->suspend)
- pdata->suspend(0);
-
- /* Calculate referecne clock */
- s->uartclk = max310x_set_ref_clk(s);
-
- /* Disable all interrupts */
- regmap_write(s->regmap, MAX310X_IRQEN_REG, 0);
-
- /* Setup MODE1 register */
- val = MAX310X_MODE1_IRQSEL_BIT; /* Enable IRQ pin */
- if (pdata->driver_flags & MAX310X_AUTOSLEEP)
- val = MAX310X_MODE1_AUTOSLEEP_BIT;
- regmap_write(s->regmap, MAX310X_MODE1_REG, val);
-
- /* Setup interrupt */
- ret = devm_request_threaded_irq(dev, spi->irq, NULL, max310x_ist,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- dev_name(dev), s);
- if (ret) {
- dev_err(dev, "Unable to reguest IRQ %i\n", spi->irq);
- goto err_out;
+ if (s->pdata->init)
+ s->pdata->init();
+
+ /* Check device to ensure we are talking to what we expect */
+ ret = devtype->detect(dev);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < devtype->nr; i++) {
+ unsigned int offs = i << 5;
+
+ /* Reset port */
+ regmap_write(s->regmap, MAX310X_MODE2_REG + offs,
+ MAX310X_MODE2_RST_BIT);
+ /* Clear port reset */
+ regmap_write(s->regmap, MAX310X_MODE2_REG + offs, 0);
+
+ /* Wait for port startup */
+ do {
+ regmap_read(s->regmap,
+ MAX310X_BRGDIVLSB_REG + offs, &ret);
+ } while (ret != 0x01);
+
+ regmap_update_bits(s->regmap, MAX310X_MODE1_REG + offs,
+ MAX310X_MODE1_AUTOSLEEP_BIT,
+ MAX310X_MODE1_AUTOSLEEP_BIT);
}
+ uartclk = max310x_set_ref_clk(s);
+ dev_dbg(dev, "Reference clock set to %i Hz\n", uartclk);
+
/* Register UART driver */
s->uart.owner = THIS_MODULE;
- s->uart.driver_name = dev_name(dev);
s->uart.dev_name = "ttyMAX";
s->uart.major = MAX310X_MAJOR;
s->uart.minor = MAX310X_MINOR;
+ s->uart.nr = devtype->nr;
ret = uart_register_driver(&s->uart);
if (ret) {
dev_err(dev, "Registering UART driver failed\n");
- goto err_out;
+ return ret;
}
- /* Initialize workqueue for start TX */
- s->wq = create_freezable_workqueue(dev_name(dev));
- INIT_WORK(&s->tx_work, max310x_wq_proc);
-
- /* Initialize UART port data */
- s->port.line = 0;
- s->port.dev = dev;
- s->port.irq = spi->irq;
- s->port.type = PORT_MAX310X;
- s->port.fifosize = MAX310X_FIFO_SIZE;
- s->port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE;
- s->port.iotype = UPIO_PORT;
- s->port.membase = (void __iomem *)0xffffffff; /* Bogus value */
- s->port.uartclk = s->uartclk;
- s->port.ops = &max310x_ops;
- uart_add_one_port(&s->uart, &s->port);
+ for (i = 0; i < devtype->nr; i++) {
+ /* Initialize port data */
+ s->p[i].port.line = i;
+ s->p[i].port.dev = dev;
+ s->p[i].port.irq = irq;
+ s->p[i].port.type = PORT_MAX310X;
+ s->p[i].port.fifosize = MAX310X_FIFO_SIZE;
+ s->p[i].port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE |
+ UPF_LOW_LATENCY;
+ s->p[i].port.iotype = UPIO_PORT;
+ s->p[i].port.iobase = i * 0x20;
+ s->p[i].port.membase = (void __iomem *)~0;
+ s->p[i].port.uartclk = uartclk;
+ s->p[i].port.ops = &max310x_ops;
+ /* Disable all interrupts */
+ max310x_port_write(&s->p[i].port, MAX310X_IRQEN_REG, 0);
+ /* Clear IRQ status register */
+ max310x_port_read(&s->p[i].port, MAX310X_IRQSTS_REG);
+ /* Enable IRQ pin */
+ max310x_port_update(&s->p[i].port, MAX310X_MODE1_REG,
+ MAX310X_MODE1_IRQSEL_BIT,
+ MAX310X_MODE1_IRQSEL_BIT);
+ /* Initialize queue for start TX */
+ INIT_WORK(&s->p[i].tx_work, max310x_wq_proc);
+ /* Register port */
+ uart_add_one_port(&s->uart, &s->p[i].port);
+ /* Go to suspend mode */
+ devtype->power(&s->p[i].port, 0);
+ }
#ifdef CONFIG_GPIOLIB
/* Setup GPIO cotroller */
- if (pdata->gpio_base) {
+ if (s->pdata->gpio_base) {
s->gpio.owner = THIS_MODULE;
s->gpio.dev = dev;
s->gpio.label = dev_name(dev);
@@ -1179,86 +1144,105 @@ static int max310x_probe(struct spi_device *spi)
s->gpio.get = max310x_gpio_get;
s->gpio.direction_output= max310x_gpio_direction_output;
s->gpio.set = max310x_gpio_set;
- s->gpio.base = pdata->gpio_base;
- s->gpio.ngpio = s->nr_gpio;
+ s->gpio.base = s->pdata->gpio_base;
+ s->gpio.ngpio = devtype->nr * 4;
s->gpio.can_sleep = 1;
- if (gpiochip_add(&s->gpio)) {
- /* Indicate that we should not call gpiochip_remove */
- s->gpio.base = 0;
- }
+ if (!gpiochip_add(&s->gpio))
+ s->gpio_used = 1;
} else
dev_info(dev, "GPIO support not enabled\n");
#endif
- /* Go to suspend mode */
- if (pdata->suspend)
- pdata->suspend(1);
+ /* Setup interrupt */
+ ret = devm_request_threaded_irq(dev, irq, NULL, max310x_ist,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ dev_name(dev), s);
+ if (ret) {
+ dev_err(dev, "Unable to reguest IRQ %i\n", irq);
+#ifdef CONFIG_GPIOLIB
+ if (s->gpio_used)
+ WARN_ON(gpiochip_remove(&s->gpio));
+#endif
+ }
- return 0;
+ return ret;
err_freq:
dev_err(dev, "Frequency parameter incorrect\n");
- ret = -EINVAL;
-
-err_out:
- dev_set_drvdata(dev, NULL);
-
- return ret;
+ return -EINVAL;
}
-static int max310x_remove(struct spi_device *spi)
+static int max310x_remove(struct device *dev)
{
- struct device *dev = &spi->dev;
struct max310x_port *s = dev_get_drvdata(dev);
- int ret = 0;
-
- dev_dbg(dev, "Removing port\n");
-
- devm_free_irq(dev, s->port.irq, s);
+ int i, ret = 0;
- destroy_workqueue(s->wq);
-
- uart_remove_one_port(&s->uart, &s->port);
+ for (i = 0; i < s->uart.nr; i++) {
+ cancel_work_sync(&s->p[i].tx_work);
+ uart_remove_one_port(&s->uart, &s->p[i].port);
+ s->devtype->power(&s->p[i].port, 0);
+ }
uart_unregister_driver(&s->uart);
#ifdef CONFIG_GPIOLIB
- if (s->pdata->gpio_base) {
+ if (s->gpio_used)
ret = gpiochip_remove(&s->gpio);
- if (ret)
- dev_err(dev, "Failed to remove gpio chip: %d\n", ret);
- }
#endif
- dev_set_drvdata(dev, NULL);
-
- if (s->pdata->suspend)
- s->pdata->suspend(1);
if (s->pdata->exit)
s->pdata->exit();
return ret;
}
+#ifdef CONFIG_SPI_MASTER
+static int max310x_spi_probe(struct spi_device *spi)
+{
+ struct max310x_devtype *devtype =
+ (struct max310x_devtype *)spi_get_device_id(spi)->driver_data;
+ int ret;
+
+ /* Setup SPI bus */
+ spi->bits_per_word = 8;
+ spi->mode = spi->mode ? : SPI_MODE_0;
+ spi->max_speed_hz = spi->max_speed_hz ? : 26000000;
+ ret = spi_setup(spi);
+ if (ret) {
+ dev_err(&spi->dev, "SPI setup failed\n");
+ return ret;
+ }
+
+ return max310x_probe(&spi->dev, 1, devtype, spi->irq);
+}
+
+static int max310x_spi_remove(struct spi_device *spi)
+{
+ return max310x_remove(&spi->dev);
+}
+
+static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume);
+
static const struct spi_device_id max310x_id_table[] = {
- { "max3107", MAX310X_TYPE_MAX3107 },
- { "max3108", MAX310X_TYPE_MAX3108 },
+ { "max3107", (kernel_ulong_t)&max3107_devtype, },
+ { "max3108", (kernel_ulong_t)&max3108_devtype, },
{ }
};
MODULE_DEVICE_TABLE(spi, max310x_id_table);
-static struct spi_driver max310x_driver = {
+static struct spi_driver max310x_uart_driver = {
.driver = {
- .name = "max310x",
+ .name = MAX310X_NAME,
.owner = THIS_MODULE,
- .pm = MAX310X_PM_OPS,
+ .pm = &max310x_pm_ops,
},
- .probe = max310x_probe,
- .remove = max310x_remove,
+ .probe = max310x_spi_probe,
+ .remove = max310x_spi_remove,
.id_table = max310x_id_table,
};
-module_spi_driver(max310x_driver);
+module_spi_driver(max310x_uart_driver);
+#endif
-MODULE_LICENSE("GPL v2");
+MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alexander Shiyan <shc_work@xxxxxxx>");
MODULE_DESCRIPTION("MAX310X serial driver");
diff --git a/include/linux/platform_data/max310x.h b/include/linux/platform_data/max310x.h
index 91648bf..1aec0b6 100644
--- a/include/linux/platform_data/max310x.h
+++ b/include/linux/platform_data/max310x.h
@@ -42,9 +42,8 @@
/* MAX310X platform data structure */
struct max310x_pdata {
/* Flags global to driver */
- const u8 driver_flags:2;
+ const u8 driver_flags;
#define MAX310X_EXT_CLK (0x00000001) /* External clock enable */
-#define MAX310X_AUTOSLEEP (0x00000002) /* Enable AutoSleep mode */
/* Flags global to UART port */
const u8 uart_flags[MAX310X_MAX_UARTS];
#define MAX310X_LOOPBACK (0x00000001) /* Loopback mode enable */
@@ -60,8 +59,6 @@ struct max310x_pdata {
void (*init)(void);
/* Called before finish */
void (*exit)(void);
- /* Suspend callback */
- void (*suspend)(int do_suspend);
};
#endif
--
1.8.1.5
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