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Message-Id: <1386321003-8960-1-git-send-email-ynvich@gmail.com>
Date: Fri, 6 Dec 2013 13:09:31 +0400
From: Sergei Ianovich <ynvich@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Sergei Ianovich <ynvich@...il.com>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
James Cameron <quozl@...top.org>,
Russell King <linux@....linux.org.uk>,
Jiri Slaby <jslaby@...e.cz>,
Grant Likely <grant.likely@...aro.org>,
Rob Herring <rob.herring@...xeda.com>,
Zhou Zhu <zzhu3@...vell.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Haojian Zhuang <haojian.zhuang@...il.com>,
Stefan Seyfried <seife+kernel@...systems.com>,
John Crispin <blogic@...nwrt.org>,
Paul Bolle <pebolle@...cali.nl>,
linux-arm-kernel@...ts.infradead.org (moderated list:ARM PORT),
linux-serial@...r.kernel.org (open list:SERIAL DRIVERS),
devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND...)
Subject: [PATCH v2] serial: rewrite pxa2xx-uart to use 8250_core
pxa2xx-uart was a separate uart platform driver. It was declaring
the same device names and numbers as 8250 driver. As a result,
it was impossible to use 8250 driver on PXA SoCs.
Upon closer examination pxa2xx-uart turned out to be a clone of
8250_core driver.
Workaround for Erratum #19 according to Marvel(R) PXA270M Processor
Specification Update (April 19, 2010) is dropped. 8250_core reads
from FIFO immediately after checking DR bit in LSR.
Signed-off-by: Sergei Ianovich <ynvich@...il.com>
CC: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: James Cameron <quozl@...top.org>
---
changes v1..v2
* actually implement workaround for E74 in dl_write as spooted
by James Cameron
* added comment about E19 in commit message
arch/arm/configs/am200epdkit_defconfig | 3 +-
arch/arm/configs/cm_x2xx_defconfig | 3 +-
arch/arm/configs/cm_x300_defconfig | 3 +-
arch/arm/configs/colibri_pxa270_defconfig | 3 +-
arch/arm/configs/colibri_pxa300_defconfig | 3 +-
arch/arm/configs/corgi_defconfig | 4 +-
arch/arm/configs/em_x270_defconfig | 3 +-
arch/arm/configs/ezx_defconfig | 3 +-
arch/arm/configs/h5000_defconfig | 3 +-
arch/arm/configs/imote2_defconfig | 3 +-
arch/arm/configs/lpd270_defconfig | 3 +-
arch/arm/configs/lubbock_defconfig | 3 +-
arch/arm/configs/mainstone_defconfig | 3 +-
arch/arm/configs/mmp2_defconfig | 3 +-
arch/arm/configs/pcm027_defconfig | 3 +-
arch/arm/configs/pxa168_defconfig | 3 +-
arch/arm/configs/pxa255-idp_defconfig | 3 +-
arch/arm/configs/pxa3xx_defconfig | 3 +-
arch/arm/configs/pxa910_defconfig | 3 +-
arch/arm/configs/raumfeld_defconfig | 3 +-
arch/arm/configs/spitz_defconfig | 4 +-
arch/arm/configs/trizeps4_defconfig | 3 +-
arch/arm/configs/viper_defconfig | 4 +-
arch/arm/configs/xcep_defconfig | 3 +-
drivers/tty/serial/8250/8250_pxa.c | 189 ++++++
drivers/tty/serial/8250/Kconfig | 9 +
drivers/tty/serial/8250/Makefile | 1 +
drivers/tty/serial/Kconfig | 23 -
drivers/tty/serial/Makefile | 1 -
drivers/tty/serial/pxa.c | 971 ------------------------------
30 files changed, 247 insertions(+), 1022 deletions(-)
create mode 100644 drivers/tty/serial/8250/8250_pxa.c
delete mode 100644 drivers/tty/serial/pxa.c
diff --git a/arch/arm/configs/am200epdkit_defconfig b/arch/arm/configs/am200epdkit_defconfig
index f0dea52..0cde234 100644
--- a/arch/arm/configs/am200epdkit_defconfig
+++ b/arch/arm/configs/am200epdkit_defconfig
@@ -60,8 +60,9 @@ CONFIG_BLK_DEV_IDECS=m
CONFIG_NETDEVICES=y
CONFIG_NET_ETHERNET=y
CONFIG_SMC91X=m
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
diff --git a/arch/arm/configs/cm_x2xx_defconfig b/arch/arm/configs/cm_x2xx_defconfig
index a93ff8d..b9fbe65 100644
--- a/arch/arm/configs/cm_x2xx_defconfig
+++ b/arch/arm/configs/cm_x2xx_defconfig
@@ -96,8 +96,9 @@ CONFIG_KEYBOARD_PXA27x=m
CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_TOUCHSCREEN_UCB1400=m
# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_LEGACY_PTY_COUNT=16
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
diff --git a/arch/arm/configs/cm_x300_defconfig b/arch/arm/configs/cm_x300_defconfig
index f4b7672..53a82ae 100644
--- a/arch/arm/configs/cm_x300_defconfig
+++ b/arch/arm/configs/cm_x300_defconfig
@@ -80,8 +80,9 @@ CONFIG_TOUCHSCREEN_WM97XX=m
# CONFIG_TOUCHSCREEN_WM9713 is not set
# CONFIG_SERIO is not set
# CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
CONFIG_I2C_PXA=y
diff --git a/arch/arm/configs/colibri_pxa270_defconfig b/arch/arm/configs/colibri_pxa270_defconfig
index 2ef2c5e..1ce0409 100644
--- a/arch/arm/configs/colibri_pxa270_defconfig
+++ b/arch/arm/configs/colibri_pxa270_defconfig
@@ -103,8 +103,9 @@ CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_UINPUT=m
CONFIG_SERIO_LIBPS2=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_HW_RANDOM=y
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
diff --git a/arch/arm/configs/colibri_pxa300_defconfig b/arch/arm/configs/colibri_pxa300_defconfig
index b985334..f96bda0 100644
--- a/arch/arm/configs/colibri_pxa300_defconfig
+++ b/arch/arm/configs/colibri_pxa300_defconfig
@@ -31,8 +31,9 @@ CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_MOUSE is not set
CONFIG_INPUT_MISC=y
CONFIG_INPUT_GPIO_ROTARY_ENCODER=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_HW_RANDOM=y
CONFIG_DEBUG_GPIO=y
# CONFIG_HWMON is not set
diff --git a/arch/arm/configs/corgi_defconfig b/arch/arm/configs/corgi_defconfig
index 1fd1d1d..bb4842d 100644
--- a/arch/arm/configs/corgi_defconfig
+++ b/arch/arm/configs/corgi_defconfig
@@ -131,10 +131,10 @@ CONFIG_TOUCHSCREEN_ADS7846=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_UINPUT=m
# CONFIG_SERIO is not set
-CONFIG_SERIAL_8250=m
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_CS=m
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_I2C=y
CONFIG_I2C_PXA=y
diff --git a/arch/arm/configs/em_x270_defconfig b/arch/arm/configs/em_x270_defconfig
index 60a21e0..ec0ec54 100644
--- a/arch/arm/configs/em_x270_defconfig
+++ b/arch/arm/configs/em_x270_defconfig
@@ -90,8 +90,9 @@ CONFIG_TOUCHSCREEN_WM97XX=m
# CONFIG_TOUCHSCREEN_WM9705 is not set
# CONFIG_TOUCHSCREEN_WM9713 is not set
# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_LEGACY_PTY_COUNT=16
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
diff --git a/arch/arm/configs/ezx_defconfig b/arch/arm/configs/ezx_defconfig
index d95763d..631e2ec 100644
--- a/arch/arm/configs/ezx_defconfig
+++ b/arch/arm/configs/ezx_defconfig
@@ -215,8 +215,9 @@ CONFIG_INPUT_MISC=y
CONFIG_INPUT_UINPUT=y
CONFIG_INPUT_PCAP=y
# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_LEGACY_PTY_COUNT=8
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
diff --git a/arch/arm/configs/h5000_defconfig b/arch/arm/configs/h5000_defconfig
index 37903e3..655b735 100644
--- a/arch/arm/configs/h5000_defconfig
+++ b/arch/arm/configs/h5000_defconfig
@@ -47,8 +47,9 @@ CONFIG_MTD_PHYSMAP=y
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_LEGACY_PTY_COUNT=32
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
diff --git a/arch/arm/configs/imote2_defconfig b/arch/arm/configs/imote2_defconfig
index fd996bb..49d45e9 100644
--- a/arch/arm/configs/imote2_defconfig
+++ b/arch/arm/configs/imote2_defconfig
@@ -193,8 +193,9 @@ CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_UINPUT=y
# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_LEGACY_PTY_COUNT=8
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
diff --git a/arch/arm/configs/lpd270_defconfig b/arch/arm/configs/lpd270_defconfig
index 1c8c9ee..c3927b6 100644
--- a/arch/arm/configs/lpd270_defconfig
+++ b/arch/arm/configs/lpd270_defconfig
@@ -38,8 +38,9 @@ CONFIG_SMC91X=y
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_HW_RANDOM is not set
CONFIG_FB=y
CONFIG_FB_PXA=y
diff --git a/arch/arm/configs/lubbock_defconfig b/arch/arm/configs/lubbock_defconfig
index c4ba274..c8b0436 100644
--- a/arch/arm/configs/lubbock_defconfig
+++ b/arch/arm/configs/lubbock_defconfig
@@ -37,8 +37,9 @@ CONFIG_PCMCIA_PCNET=y
CONFIG_INPUT_EVDEV=y
# CONFIG_SERIO_SERPORT is not set
CONFIG_SERIO_SA1111=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_VGA_CONSOLE is not set
CONFIG_USB_GADGET=y
CONFIG_USB_G_SERIAL=m
diff --git a/arch/arm/configs/mainstone_defconfig b/arch/arm/configs/mainstone_defconfig
index 04efa1b..768892c 100644
--- a/arch/arm/configs/mainstone_defconfig
+++ b/arch/arm/configs/mainstone_defconfig
@@ -34,8 +34,9 @@ CONFIG_SMC91X=y
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_FB=y
CONFIG_FB_PXA=y
# CONFIG_VGA_CONSOLE is not set
diff --git a/arch/arm/configs/mmp2_defconfig b/arch/arm/configs/mmp2_defconfig
index f1cb95e..1ced9df 100644
--- a/arch/arm/configs/mmp2_defconfig
+++ b/arch/arm/configs/mmp2_defconfig
@@ -44,8 +44,9 @@ CONFIG_SMC91X=y
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
diff --git a/arch/arm/configs/pcm027_defconfig b/arch/arm/configs/pcm027_defconfig
index 2f136c3..1280128 100644
--- a/arch/arm/configs/pcm027_defconfig
+++ b/arch/arm/configs/pcm027_defconfig
@@ -60,8 +60,9 @@ CONFIG_SMC91X=y
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
diff --git a/arch/arm/configs/pxa168_defconfig b/arch/arm/configs/pxa168_defconfig
index 74d7e01..1668dac 100644
--- a/arch/arm/configs/pxa168_defconfig
+++ b/arch/arm/configs/pxa168_defconfig
@@ -40,8 +40,9 @@ CONFIG_SMC91X=y
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
diff --git a/arch/arm/configs/pxa255-idp_defconfig b/arch/arm/configs/pxa255-idp_defconfig
index 917a070..399a706 100644
--- a/arch/arm/configs/pxa255-idp_defconfig
+++ b/arch/arm/configs/pxa255-idp_defconfig
@@ -35,8 +35,9 @@ CONFIG_SMC91X=y
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_FB=y
CONFIG_FB_PXA=y
# CONFIG_VGA_CONSOLE is not set
diff --git a/arch/arm/configs/pxa3xx_defconfig b/arch/arm/configs/pxa3xx_defconfig
index 60e3138..7c3e052 100644
--- a/arch/arm/configs/pxa3xx_defconfig
+++ b/arch/arm/configs/pxa3xx_defconfig
@@ -56,8 +56,9 @@ CONFIG_KEYBOARD_PXA27x=y
CONFIG_KEYBOARD_PXA930_ROTARY=y
CONFIG_MOUSE_PXA930_TRKBALL=y
CONFIG_INPUT_TOUCHSCREEN=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
diff --git a/arch/arm/configs/pxa910_defconfig b/arch/arm/configs/pxa910_defconfig
index 3bb7771..cdacfcb 100644
--- a/arch/arm/configs/pxa910_defconfig
+++ b/arch/arm/configs/pxa910_defconfig
@@ -40,8 +40,9 @@ CONFIG_SMC91X=y
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_SPI=y
CONFIG_FB=y
CONFIG_MMP_DISP=y
diff --git a/arch/arm/configs/raumfeld_defconfig b/arch/arm/configs/raumfeld_defconfig
index f7caa90..f1e16f2 100644
--- a/arch/arm/configs/raumfeld_defconfig
+++ b/arch/arm/configs/raumfeld_defconfig
@@ -67,8 +67,9 @@ CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_TOUCHSCREEN_EETI=m
CONFIG_INPUT_MISC=y
CONFIG_INPUT_GPIO_ROTARY_ENCODER=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_HW_RANDOM=y
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
diff --git a/arch/arm/configs/spitz_defconfig b/arch/arm/configs/spitz_defconfig
index 2e0419d..b6efcf5 100644
--- a/arch/arm/configs/spitz_defconfig
+++ b/arch/arm/configs/spitz_defconfig
@@ -128,10 +128,10 @@ CONFIG_TOUCHSCREEN_ADS7846=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_UINPUT=m
# CONFIG_SERIO is not set
-CONFIG_SERIAL_8250=m
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_CS=m
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_SPI=y
CONFIG_SPI_PXA2XX=y
diff --git a/arch/arm/configs/trizeps4_defconfig b/arch/arm/configs/trizeps4_defconfig
index 3162173..453c79c 100644
--- a/arch/arm/configs/trizeps4_defconfig
+++ b/arch/arm/configs/trizeps4_defconfig
@@ -132,8 +132,9 @@ CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_UINPUT=m
CONFIG_SERIO_LIBPS2=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
CONFIG_HW_RANDOM=y
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
diff --git a/arch/arm/configs/viper_defconfig b/arch/arm/configs/viper_defconfig
index d36e0d3..4efac06 100644
--- a/arch/arm/configs/viper_defconfig
+++ b/arch/arm/configs/viper_defconfig
@@ -101,11 +101,11 @@ CONFIG_INPUT_MISC=y
CONFIG_INPUT_UINPUT=m
# CONFIG_CONSOLE_TRANSLATIONS is not set
# CONFIG_VT_CONSOLE is not set
-CONFIG_SERIAL_8250=m
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_NR_UARTS=5
CONFIG_SERIAL_8250_RUNTIME_UARTS=5
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
diff --git a/arch/arm/configs/xcep_defconfig b/arch/arm/configs/xcep_defconfig
index 721832f..b67aeaf 100644
--- a/arch/arm/configs/xcep_defconfig
+++ b/arch/arm/configs/xcep_defconfig
@@ -60,8 +60,9 @@ CONFIG_NET_ETHERNET=y
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_PXA=y
-CONFIG_SERIAL_PXA_CONSOLE=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=m
diff --git a/drivers/tty/serial/8250/8250_pxa.c b/drivers/tty/serial/8250/8250_pxa.c
new file mode 100644
index 0000000..88ae73c
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_pxa.c
@@ -0,0 +1,189 @@
+/*
+ * drivers/tty/serial/8250/8250_pxa.c -- driver for PXA on-board UARTS
+ * Copyright: (C) 2013 Sergei Ianovich <ynvich@...il.com>
+ *
+ * replaces drivers/serial/pxa.c by Nicolas Pitre
+ * Created: Feb 20, 2003
+ * Copyright: (C) 2003 Monta Vista Software, Inc.
+ *
+ * Based on drivers/serial/8250.c by Russell King.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/serial_8250.h>
+#include <linux/serial_core.h>
+#include <linux/serial_reg.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/pm_runtime.h>
+
+#include "8250.h"
+
+struct pxa8250_data {
+ int line;
+ struct clk *clk;
+};
+
+#ifdef CONFIG_PM
+static int serial_pxa_suspend(struct device *dev)
+{
+ struct pxa8250_data *data = dev_get_drvdata(dev);
+
+ serial8250_suspend_port(data->line);
+
+ return 0;
+}
+
+static int serial_pxa_resume(struct device *dev)
+{
+ struct pxa8250_data *data = dev_get_drvdata(dev);
+
+ serial8250_resume_port(data->line);
+
+ return 0;
+}
+
+static const struct dev_pm_ops serial_pxa_pm_ops = {
+ .suspend = serial_pxa_suspend,
+ .resume = serial_pxa_resume,
+};
+#endif
+
+static struct of_device_id serial_pxa_dt_ids[] = {
+ { .compatible = "mrvl,pxa-uart", },
+ { .compatible = "mrvl,mmp-uart", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, serial_pxa_dt_ids);
+
+/* Uart divisor latch write */
+static void serial_pxa_dl_write(struct uart_8250_port *up, int value)
+{
+ unsigned int dll;
+
+ serial_out(up, UART_DLL, value & 0xff);
+ /*
+ * work around Erratum #74 according to Marvel(R) PXA270M Processor
+ * Specification Update (April 19, 2010)
+ */
+ dll = serial_in(up, UART_DLL);
+ WARN_ON(dll != (value & 0xff));
+
+ serial_out(up, UART_DLM, value >> 8 & 0xff);
+}
+
+
+static void serial_pxa_pm(struct uart_port *port, unsigned int state,
+ unsigned int oldstate)
+{
+ struct pxa8250_data *data = port->private_data;
+
+ if (!state)
+ clk_prepare_enable(data->clk);
+ else
+ clk_disable_unprepare(data->clk);
+}
+
+static int serial_pxa_probe(struct platform_device *pdev)
+{
+ struct uart_8250_port uart = {};
+ struct pxa8250_data *data;
+ struct resource *mmres, *irqres;
+ int ret;
+
+ mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irqres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!mmres || !irqres)
+ return -ENODEV;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(data->clk)) {
+ ret = PTR_ERR(data->clk);
+ goto err_free;
+ }
+
+ ret = clk_prepare(data->clk);
+ if (ret)
+ goto err_free_clk;
+
+ uart.port.type = PORT_XSCALE;
+ uart.port.iotype = UPIO_MEM32;
+ uart.port.mapbase = mmres->start;
+ uart.port.regshift = 2;
+ uart.port.irq = irqres->start;
+ uart.port.fifosize = 64;
+ uart.port.flags = UPF_IOREMAP | UPF_SKIP_TEST;
+ uart.port.dev = &pdev->dev;
+ uart.port.uartclk = clk_get_rate(data->clk);
+ uart.port.pm = serial_pxa_pm;
+ uart.port.private_data = data;
+ uart.dl_write = serial_pxa_dl_write;
+
+ ret = serial8250_register_8250_port(&uart);
+ if (ret < 0)
+ goto err_clk;
+
+ data->line = ret;
+
+ platform_set_drvdata(pdev, data);
+
+ return 0;
+
+ err_clk:
+ clk_unprepare(data->clk);
+ err_free_clk:
+ devm_clk_put(&pdev->dev, data->clk);
+ err_free:
+ devm_kfree(&pdev->dev, data);
+ return ret;
+}
+
+static int serial_pxa_remove(struct platform_device *pdev)
+{
+ struct pxa8250_data *data = platform_get_drvdata(pdev);
+
+ serial8250_unregister_port(data->line);
+
+ clk_unprepare(data->clk);
+ devm_clk_put(&pdev->dev, data->clk);
+ devm_kfree(&pdev->dev, data);
+
+ return 0;
+}
+
+static struct platform_driver serial_pxa_driver = {
+ .probe = serial_pxa_probe,
+ .remove = serial_pxa_remove,
+
+ .driver = {
+ .name = "pxa2xx-uart",
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &serial_pxa_pm_ops,
+#endif
+ .of_match_table = serial_pxa_dt_ids,
+ },
+};
+
+module_platform_driver(serial_pxa_driver);
+
+MODULE_AUTHOR("Sergei Ianovich");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa2xx-uart");
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 2332991..81bd7c9 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -302,3 +302,12 @@ config SERIAL_8250_RT288X
If you have a Ralink RT288x/RT305x SoC based board and want to use the
serial port, say Y to this option. The driver can handle up to 2 serial
ports. If unsure, say N.
+
+config SERIAL_PXA
+ tristate "PXA serial port support"
+ depends on SERIAL_8250 && (ARCH_PXA || ARCH_MMP)
+ help
+ If you have a machine based on an Intel XScale PXA2xx CPU you
+ can enable its onboard serial ports by enabling this option.
+
+ If you choose M here, the module name will be 8250_pxa.
diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile
index 36d68d0..b7d1b61 100644
--- a/drivers/tty/serial/8250/Makefile
+++ b/drivers/tty/serial/8250/Makefile
@@ -20,3 +20,4 @@ obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o
obj-$(CONFIG_SERIAL_8250_FSL) += 8250_fsl.o
obj-$(CONFIG_SERIAL_8250_DW) += 8250_dw.o
obj-$(CONFIG_SERIAL_8250_EM) += 8250_em.o
+obj-$(CONFIG_SERIAL_PXA) += 8250_pxa.o
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index a3817ab..2ad7184b 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -396,29 +396,6 @@ config SERIAL_MPSC_CONSOLE
help
Say Y here if you want to support a serial console on a Marvell MPSC.
-config SERIAL_PXA
- bool "PXA serial port support"
- depends on ARCH_PXA || ARCH_MMP
- select SERIAL_CORE
- help
- If you have a machine based on an Intel XScale PXA2xx CPU you
- can enable its onboard serial ports by enabling this option.
-
-config SERIAL_PXA_CONSOLE
- bool "Console on PXA serial port"
- depends on SERIAL_PXA
- select SERIAL_CORE_CONSOLE
- help
- If you have enabled the serial port on the Intel XScale PXA
- CPU you can make it the console by answering Y to this option.
-
- Even if you say Y here, the currently visible virtual console
- (/dev/tty0) will still be used as the system console by default, but
- you can alter that using a kernel command line option such as
- "console=ttySA0". (Try "man bootparam" or see the documentation of
- your boot loader (lilo or loadlin) about how to pass options to the
- kernel at boot time.)
-
config SERIAL_SA1100
bool "SA1100 serial port support"
depends on ARCH_SA1100
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index 3068c77..4ac337b 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -20,7 +20,6 @@ obj-$(CONFIG_SERIAL_8250) += 8250/
obj-$(CONFIG_SERIAL_AMBA_PL010) += amba-pl010.o
obj-$(CONFIG_SERIAL_AMBA_PL011) += amba-pl011.o
obj-$(CONFIG_SERIAL_CLPS711X) += clps711x.o
-obj-$(CONFIG_SERIAL_PXA) += pxa.o
obj-$(CONFIG_SERIAL_PNX8XXX) += pnx8xxx_uart.o
obj-$(CONFIG_SERIAL_SA1100) += sa1100.o
obj-$(CONFIG_SERIAL_BCM63XX) += bcm63xx_uart.o
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
deleted file mode 100644
index f9f20f3..0000000
--- a/drivers/tty/serial/pxa.c
+++ /dev/null
@@ -1,971 +0,0 @@
-/*
- * Based on drivers/serial/8250.c by Russell King.
- *
- * Author: Nicolas Pitre
- * Created: Feb 20, 2003
- * Copyright: (C) 2003 Monta Vista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * Note 1: This driver is made separate from the already too overloaded
- * 8250.c because it needs some kirks of its own and that'll make it
- * easier to add DMA support.
- *
- * Note 2: I'm too sick of device allocation policies for serial ports.
- * If someone else wants to request an "official" allocation of major/minor
- * for this driver please be my guest. And don't forget that new hardware
- * to come from Intel might have more than 3 or 4 of those UARTs. Let's
- * hope for a better port registration and dynamic device allocation scheme
- * with the serial core maintainer satisfaction to appear soon.
- */
-
-
-#if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/serial_reg.h>
-#include <linux/circ_buf.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#define PXA_NAME_LEN 8
-
-struct uart_pxa_port {
- struct uart_port port;
- unsigned char ier;
- unsigned char lcr;
- unsigned char mcr;
- unsigned int lsr_break_flag;
- struct clk *clk;
- char name[PXA_NAME_LEN];
-};
-
-static inline unsigned int serial_in(struct uart_pxa_port *up, int offset)
-{
- offset <<= 2;
- return readl(up->port.membase + offset);
-}
-
-static inline void serial_out(struct uart_pxa_port *up, int offset, int value)
-{
- offset <<= 2;
- writel(value, up->port.membase + offset);
-}
-
-static void serial_pxa_enable_ms(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- up->ier |= UART_IER_MSI;
- serial_out(up, UART_IER, up->ier);
-}
-
-static void serial_pxa_stop_tx(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- if (up->ier & UART_IER_THRI) {
- up->ier &= ~UART_IER_THRI;
- serial_out(up, UART_IER, up->ier);
- }
-}
-
-static void serial_pxa_stop_rx(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- up->ier &= ~UART_IER_RLSI;
- up->port.read_status_mask &= ~UART_LSR_DR;
- serial_out(up, UART_IER, up->ier);
-}
-
-static inline void receive_chars(struct uart_pxa_port *up, int *status)
-{
- unsigned int ch, flag;
- int max_count = 256;
-
- do {
- /* work around Errata #20 according to
- * Intel(R) PXA27x Processor Family
- * Specification Update (May 2005)
- *
- * Step 2
- * Disable the Reciever Time Out Interrupt via IER[RTOEI]
- */
- up->ier &= ~UART_IER_RTOIE;
- serial_out(up, UART_IER, up->ier);
-
- ch = serial_in(up, UART_RX);
- flag = TTY_NORMAL;
- up->port.icount.rx++;
-
- if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
- UART_LSR_FE | UART_LSR_OE))) {
- /*
- * For statistics only
- */
- if (*status & UART_LSR_BI) {
- *status &= ~(UART_LSR_FE | UART_LSR_PE);
- up->port.icount.brk++;
- /*
- * We do the SysRQ and SAK checking
- * here because otherwise the break
- * may get masked by ignore_status_mask
- * or read_status_mask.
- */
- if (uart_handle_break(&up->port))
- goto ignore_char;
- } else if (*status & UART_LSR_PE)
- up->port.icount.parity++;
- else if (*status & UART_LSR_FE)
- up->port.icount.frame++;
- if (*status & UART_LSR_OE)
- up->port.icount.overrun++;
-
- /*
- * Mask off conditions which should be ignored.
- */
- *status &= up->port.read_status_mask;
-
-#ifdef CONFIG_SERIAL_PXA_CONSOLE
- if (up->port.line == up->port.cons->index) {
- /* Recover the break flag from console xmit */
- *status |= up->lsr_break_flag;
- up->lsr_break_flag = 0;
- }
-#endif
- if (*status & UART_LSR_BI) {
- flag = TTY_BREAK;
- } else if (*status & UART_LSR_PE)
- flag = TTY_PARITY;
- else if (*status & UART_LSR_FE)
- flag = TTY_FRAME;
- }
-
- if (uart_handle_sysrq_char(&up->port, ch))
- goto ignore_char;
-
- uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag);
-
- ignore_char:
- *status = serial_in(up, UART_LSR);
- } while ((*status & UART_LSR_DR) && (max_count-- > 0));
- tty_flip_buffer_push(&up->port.state->port);
-
- /* work around Errata #20 according to
- * Intel(R) PXA27x Processor Family
- * Specification Update (May 2005)
- *
- * Step 6:
- * No more data in FIFO: Re-enable RTO interrupt via IER[RTOIE]
- */
- up->ier |= UART_IER_RTOIE;
- serial_out(up, UART_IER, up->ier);
-}
-
-static void transmit_chars(struct uart_pxa_port *up)
-{
- struct circ_buf *xmit = &up->port.state->xmit;
- int count;
-
- if (up->port.x_char) {
- serial_out(up, UART_TX, up->port.x_char);
- up->port.icount.tx++;
- up->port.x_char = 0;
- return;
- }
- if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
- serial_pxa_stop_tx(&up->port);
- return;
- }
-
- count = up->port.fifosize / 2;
- do {
- serial_out(up, UART_TX, xmit->buf[xmit->tail]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- up->port.icount.tx++;
- if (uart_circ_empty(xmit))
- break;
- } while (--count > 0);
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(&up->port);
-
-
- if (uart_circ_empty(xmit))
- serial_pxa_stop_tx(&up->port);
-}
-
-static void serial_pxa_start_tx(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- if (!(up->ier & UART_IER_THRI)) {
- up->ier |= UART_IER_THRI;
- serial_out(up, UART_IER, up->ier);
- }
-}
-
-static inline void check_modem_status(struct uart_pxa_port *up)
-{
- int status;
-
- status = serial_in(up, UART_MSR);
-
- if ((status & UART_MSR_ANY_DELTA) == 0)
- return;
-
- if (status & UART_MSR_TERI)
- up->port.icount.rng++;
- if (status & UART_MSR_DDSR)
- up->port.icount.dsr++;
- if (status & UART_MSR_DDCD)
- uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
- if (status & UART_MSR_DCTS)
- uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
-
- wake_up_interruptible(&up->port.state->port.delta_msr_wait);
-}
-
-/*
- * This handles the interrupt from one port.
- */
-static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id)
-{
- struct uart_pxa_port *up = dev_id;
- unsigned int iir, lsr;
-
- iir = serial_in(up, UART_IIR);
- if (iir & UART_IIR_NO_INT)
- return IRQ_NONE;
- lsr = serial_in(up, UART_LSR);
- if (lsr & UART_LSR_DR)
- receive_chars(up, &lsr);
- check_modem_status(up);
- if (lsr & UART_LSR_THRE)
- transmit_chars(up);
- return IRQ_HANDLED;
-}
-
-static unsigned int serial_pxa_tx_empty(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned long flags;
- unsigned int ret;
-
- spin_lock_irqsave(&up->port.lock, flags);
- ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- return ret;
-}
-
-static unsigned int serial_pxa_get_mctrl(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned char status;
- unsigned int ret;
-
- status = serial_in(up, UART_MSR);
-
- ret = 0;
- if (status & UART_MSR_DCD)
- ret |= TIOCM_CAR;
- if (status & UART_MSR_RI)
- ret |= TIOCM_RNG;
- if (status & UART_MSR_DSR)
- ret |= TIOCM_DSR;
- if (status & UART_MSR_CTS)
- ret |= TIOCM_CTS;
- return ret;
-}
-
-static void serial_pxa_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned char mcr = 0;
-
- if (mctrl & TIOCM_RTS)
- mcr |= UART_MCR_RTS;
- if (mctrl & TIOCM_DTR)
- mcr |= UART_MCR_DTR;
- if (mctrl & TIOCM_OUT1)
- mcr |= UART_MCR_OUT1;
- if (mctrl & TIOCM_OUT2)
- mcr |= UART_MCR_OUT2;
- if (mctrl & TIOCM_LOOP)
- mcr |= UART_MCR_LOOP;
-
- mcr |= up->mcr;
-
- serial_out(up, UART_MCR, mcr);
-}
-
-static void serial_pxa_break_ctl(struct uart_port *port, int break_state)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
- if (break_state == -1)
- up->lcr |= UART_LCR_SBC;
- else
- up->lcr &= ~UART_LCR_SBC;
- serial_out(up, UART_LCR, up->lcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static int serial_pxa_startup(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned long flags;
- int retval;
-
- if (port->line == 3) /* HWUART */
- up->mcr |= UART_MCR_AFE;
- else
- up->mcr = 0;
-
- up->port.uartclk = clk_get_rate(up->clk);
-
- /*
- * Allocate the IRQ
- */
- retval = request_irq(up->port.irq, serial_pxa_irq, 0, up->name, up);
- if (retval)
- return retval;
-
- /*
- * Clear the FIFO buffers and disable them.
- * (they will be reenabled in set_termios())
- */
- serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO);
- serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
- UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
- serial_out(up, UART_FCR, 0);
-
- /*
- * Clear the interrupt registers.
- */
- (void) serial_in(up, UART_LSR);
- (void) serial_in(up, UART_RX);
- (void) serial_in(up, UART_IIR);
- (void) serial_in(up, UART_MSR);
-
- /*
- * Now, initialize the UART
- */
- serial_out(up, UART_LCR, UART_LCR_WLEN8);
-
- spin_lock_irqsave(&up->port.lock, flags);
- up->port.mctrl |= TIOCM_OUT2;
- serial_pxa_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /*
- * Finally, enable interrupts. Note: Modem status interrupts
- * are set via set_termios(), which will be occurring imminently
- * anyway, so we don't enable them here.
- */
- up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE;
- serial_out(up, UART_IER, up->ier);
-
- /*
- * And clear the interrupt registers again for luck.
- */
- (void) serial_in(up, UART_LSR);
- (void) serial_in(up, UART_RX);
- (void) serial_in(up, UART_IIR);
- (void) serial_in(up, UART_MSR);
-
- return 0;
-}
-
-static void serial_pxa_shutdown(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned long flags;
-
- free_irq(up->port.irq, up);
-
- /*
- * Disable interrupts from this port
- */
- up->ier = 0;
- serial_out(up, UART_IER, 0);
-
- spin_lock_irqsave(&up->port.lock, flags);
- up->port.mctrl &= ~TIOCM_OUT2;
- serial_pxa_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /*
- * Disable break condition and FIFOs
- */
- serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
- serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
- UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT);
- serial_out(up, UART_FCR, 0);
-}
-
-static void
-serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
- struct ktermios *old)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned char cval, fcr = 0;
- unsigned long flags;
- unsigned int baud, quot;
- unsigned int dll;
-
- switch (termios->c_cflag & CSIZE) {
- case CS5:
- cval = UART_LCR_WLEN5;
- break;
- case CS6:
- cval = UART_LCR_WLEN6;
- break;
- case CS7:
- cval = UART_LCR_WLEN7;
- break;
- default:
- case CS8:
- cval = UART_LCR_WLEN8;
- break;
- }
-
- if (termios->c_cflag & CSTOPB)
- cval |= UART_LCR_STOP;
- if (termios->c_cflag & PARENB)
- cval |= UART_LCR_PARITY;
- if (!(termios->c_cflag & PARODD))
- cval |= UART_LCR_EPAR;
-
- /*
- * Ask the core to calculate the divisor for us.
- */
- baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
- quot = uart_get_divisor(port, baud);
-
- if ((up->port.uartclk / quot) < (2400 * 16))
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1;
- else if ((up->port.uartclk / quot) < (230400 * 16))
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8;
- else
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR32;
-
- /*
- * Ok, we're now changing the port state. Do it with
- * interrupts disabled.
- */
- spin_lock_irqsave(&up->port.lock, flags);
-
- /*
- * Ensure the port will be enabled.
- * This is required especially for serial console.
- */
- up->ier |= UART_IER_UUE;
-
- /*
- * Update the per-port timeout.
- */
- uart_update_timeout(port, termios->c_cflag, baud);
-
- up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
- if (termios->c_iflag & INPCK)
- up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (termios->c_iflag & (BRKINT | PARMRK))
- up->port.read_status_mask |= UART_LSR_BI;
-
- /*
- * Characters to ignore
- */
- up->port.ignore_status_mask = 0;
- if (termios->c_iflag & IGNPAR)
- up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
- if (termios->c_iflag & IGNBRK) {
- up->port.ignore_status_mask |= UART_LSR_BI;
- /*
- * If we're ignoring parity and break indicators,
- * ignore overruns too (for real raw support).
- */
- if (termios->c_iflag & IGNPAR)
- up->port.ignore_status_mask |= UART_LSR_OE;
- }
-
- /*
- * ignore all characters if CREAD is not set
- */
- if ((termios->c_cflag & CREAD) == 0)
- up->port.ignore_status_mask |= UART_LSR_DR;
-
- /*
- * CTS flow control flag and modem status interrupts
- */
- up->ier &= ~UART_IER_MSI;
- if (UART_ENABLE_MS(&up->port, termios->c_cflag))
- up->ier |= UART_IER_MSI;
-
- serial_out(up, UART_IER, up->ier);
-
- if (termios->c_cflag & CRTSCTS)
- up->mcr |= UART_MCR_AFE;
- else
- up->mcr &= ~UART_MCR_AFE;
-
- serial_out(up, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
- serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */
-
- /*
- * work around Errata #75 according to Intel(R) PXA27x Processor Family
- * Specification Update (Nov 2005)
- */
- dll = serial_in(up, UART_DLL);
- WARN_ON(dll != (quot & 0xff));
-
- serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */
- serial_out(up, UART_LCR, cval); /* reset DLAB */
- up->lcr = cval; /* Save LCR */
- serial_pxa_set_mctrl(&up->port, up->port.mctrl);
- serial_out(up, UART_FCR, fcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static void
-serial_pxa_pm(struct uart_port *port, unsigned int state,
- unsigned int oldstate)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- if (!state)
- clk_prepare_enable(up->clk);
- else
- clk_disable_unprepare(up->clk);
-}
-
-static void serial_pxa_release_port(struct uart_port *port)
-{
-}
-
-static int serial_pxa_request_port(struct uart_port *port)
-{
- return 0;
-}
-
-static void serial_pxa_config_port(struct uart_port *port, int flags)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- up->port.type = PORT_PXA;
-}
-
-static int
-serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
- /* we don't want the core code to modify any port params */
- return -EINVAL;
-}
-
-static const char *
-serial_pxa_type(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- return up->name;
-}
-
-static struct uart_pxa_port *serial_pxa_ports[4];
-static struct uart_driver serial_pxa_reg;
-
-#ifdef CONFIG_SERIAL_PXA_CONSOLE
-
-#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
-
-/*
- * Wait for transmitter & holding register to empty
- */
-static inline void wait_for_xmitr(struct uart_pxa_port *up)
-{
- unsigned int status, tmout = 10000;
-
- /* Wait up to 10ms for the character(s) to be sent. */
- do {
- status = serial_in(up, UART_LSR);
-
- if (status & UART_LSR_BI)
- up->lsr_break_flag = UART_LSR_BI;
-
- if (--tmout == 0)
- break;
- udelay(1);
- } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
-
- /* Wait up to 1s for flow control if necessary */
- if (up->port.flags & UPF_CONS_FLOW) {
- tmout = 1000000;
- while (--tmout &&
- ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
- udelay(1);
- }
-}
-
-static void serial_pxa_console_putchar(struct uart_port *port, int ch)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- wait_for_xmitr(up);
- serial_out(up, UART_TX, ch);
-}
-
-/*
- * Print a string to the serial port trying not to disturb
- * any possible real use of the port...
- *
- * The console_lock must be held when we get here.
- */
-static void
-serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
-{
- struct uart_pxa_port *up = serial_pxa_ports[co->index];
- unsigned int ier;
- unsigned long flags;
- int locked = 1;
-
- clk_enable(up->clk);
- local_irq_save(flags);
- if (up->port.sysrq)
- locked = 0;
- else if (oops_in_progress)
- locked = spin_trylock(&up->port.lock);
- else
- spin_lock(&up->port.lock);
-
- /*
- * First save the IER then disable the interrupts
- */
- ier = serial_in(up, UART_IER);
- serial_out(up, UART_IER, UART_IER_UUE);
-
- uart_console_write(&up->port, s, count, serial_pxa_console_putchar);
-
- /*
- * Finally, wait for transmitter to become empty
- * and restore the IER
- */
- wait_for_xmitr(up);
- serial_out(up, UART_IER, ier);
-
- if (locked)
- spin_unlock(&up->port.lock);
- local_irq_restore(flags);
- clk_disable(up->clk);
-
-}
-
-#ifdef CONFIG_CONSOLE_POLL
-/*
- * Console polling routines for writing and reading from the uart while
- * in an interrupt or debug context.
- */
-
-static int serial_pxa_get_poll_char(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned char lsr = serial_in(up, UART_LSR);
-
- while (!(lsr & UART_LSR_DR))
- lsr = serial_in(up, UART_LSR);
-
- return serial_in(up, UART_RX);
-}
-
-
-static void serial_pxa_put_poll_char(struct uart_port *port,
- unsigned char c)
-{
- unsigned int ier;
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- /*
- * First save the IER then disable the interrupts
- */
- ier = serial_in(up, UART_IER);
- serial_out(up, UART_IER, UART_IER_UUE);
-
- wait_for_xmitr(up);
- /*
- * Send the character out.
- * If a LF, also do CR...
- */
- serial_out(up, UART_TX, c);
- if (c == 10) {
- wait_for_xmitr(up);
- serial_out(up, UART_TX, 13);
- }
-
- /*
- * Finally, wait for transmitter to become empty
- * and restore the IER
- */
- wait_for_xmitr(up);
- serial_out(up, UART_IER, ier);
-}
-
-#endif /* CONFIG_CONSOLE_POLL */
-
-static int __init
-serial_pxa_console_setup(struct console *co, char *options)
-{
- struct uart_pxa_port *up;
- int baud = 9600;
- int bits = 8;
- int parity = 'n';
- int flow = 'n';
-
- if (co->index == -1 || co->index >= serial_pxa_reg.nr)
- co->index = 0;
- up = serial_pxa_ports[co->index];
- if (!up)
- return -ENODEV;
-
- if (options)
- uart_parse_options(options, &baud, &parity, &bits, &flow);
-
- return uart_set_options(&up->port, co, baud, parity, bits, flow);
-}
-
-static struct console serial_pxa_console = {
- .name = "ttyS",
- .write = serial_pxa_console_write,
- .device = uart_console_device,
- .setup = serial_pxa_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &serial_pxa_reg,
-};
-
-#define PXA_CONSOLE &serial_pxa_console
-#else
-#define PXA_CONSOLE NULL
-#endif
-
-static struct uart_ops serial_pxa_pops = {
- .tx_empty = serial_pxa_tx_empty,
- .set_mctrl = serial_pxa_set_mctrl,
- .get_mctrl = serial_pxa_get_mctrl,
- .stop_tx = serial_pxa_stop_tx,
- .start_tx = serial_pxa_start_tx,
- .stop_rx = serial_pxa_stop_rx,
- .enable_ms = serial_pxa_enable_ms,
- .break_ctl = serial_pxa_break_ctl,
- .startup = serial_pxa_startup,
- .shutdown = serial_pxa_shutdown,
- .set_termios = serial_pxa_set_termios,
- .pm = serial_pxa_pm,
- .type = serial_pxa_type,
- .release_port = serial_pxa_release_port,
- .request_port = serial_pxa_request_port,
- .config_port = serial_pxa_config_port,
- .verify_port = serial_pxa_verify_port,
-#ifdef CONFIG_CONSOLE_POLL
- .poll_get_char = serial_pxa_get_poll_char,
- .poll_put_char = serial_pxa_put_poll_char,
-#endif
-};
-
-static struct uart_driver serial_pxa_reg = {
- .owner = THIS_MODULE,
- .driver_name = "PXA serial",
- .dev_name = "ttyS",
- .major = TTY_MAJOR,
- .minor = 64,
- .nr = 4,
- .cons = PXA_CONSOLE,
-};
-
-#ifdef CONFIG_PM
-static int serial_pxa_suspend(struct device *dev)
-{
- struct uart_pxa_port *sport = dev_get_drvdata(dev);
-
- if (sport)
- uart_suspend_port(&serial_pxa_reg, &sport->port);
-
- return 0;
-}
-
-static int serial_pxa_resume(struct device *dev)
-{
- struct uart_pxa_port *sport = dev_get_drvdata(dev);
-
- if (sport)
- uart_resume_port(&serial_pxa_reg, &sport->port);
-
- return 0;
-}
-
-static const struct dev_pm_ops serial_pxa_pm_ops = {
- .suspend = serial_pxa_suspend,
- .resume = serial_pxa_resume,
-};
-#endif
-
-static struct of_device_id serial_pxa_dt_ids[] = {
- { .compatible = "mrvl,pxa-uart", },
- { .compatible = "mrvl,mmp-uart", },
- {}
-};
-MODULE_DEVICE_TABLE(of, serial_pxa_dt_ids);
-
-static int serial_pxa_probe_dt(struct platform_device *pdev,
- struct uart_pxa_port *sport)
-{
- struct device_node *np = pdev->dev.of_node;
- int ret;
-
- if (!np)
- return 1;
-
- ret = of_alias_get_id(np, "serial");
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to get alias id, errno %d\n", ret);
- return ret;
- }
- sport->port.line = ret;
- return 0;
-}
-
-static int serial_pxa_probe(struct platform_device *dev)
-{
- struct uart_pxa_port *sport;
- struct resource *mmres, *irqres;
- int ret;
-
- mmres = platform_get_resource(dev, IORESOURCE_MEM, 0);
- irqres = platform_get_resource(dev, IORESOURCE_IRQ, 0);
- if (!mmres || !irqres)
- return -ENODEV;
-
- sport = kzalloc(sizeof(struct uart_pxa_port), GFP_KERNEL);
- if (!sport)
- return -ENOMEM;
-
- sport->clk = clk_get(&dev->dev, NULL);
- if (IS_ERR(sport->clk)) {
- ret = PTR_ERR(sport->clk);
- goto err_free;
- }
-
- ret = clk_prepare(sport->clk);
- if (ret) {
- clk_put(sport->clk);
- goto err_free;
- }
-
- sport->port.type = PORT_PXA;
- sport->port.iotype = UPIO_MEM;
- sport->port.mapbase = mmres->start;
- sport->port.irq = irqres->start;
- sport->port.fifosize = 64;
- sport->port.ops = &serial_pxa_pops;
- sport->port.dev = &dev->dev;
- sport->port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
- sport->port.uartclk = clk_get_rate(sport->clk);
-
- ret = serial_pxa_probe_dt(dev, sport);
- if (ret > 0)
- sport->port.line = dev->id;
- else if (ret < 0)
- goto err_clk;
- snprintf(sport->name, PXA_NAME_LEN - 1, "UART%d", sport->port.line + 1);
-
- sport->port.membase = ioremap(mmres->start, resource_size(mmres));
- if (!sport->port.membase) {
- ret = -ENOMEM;
- goto err_clk;
- }
-
- serial_pxa_ports[sport->port.line] = sport;
-
- uart_add_one_port(&serial_pxa_reg, &sport->port);
- platform_set_drvdata(dev, sport);
-
- return 0;
-
- err_clk:
- clk_unprepare(sport->clk);
- clk_put(sport->clk);
- err_free:
- kfree(sport);
- return ret;
-}
-
-static int serial_pxa_remove(struct platform_device *dev)
-{
- struct uart_pxa_port *sport = platform_get_drvdata(dev);
-
- uart_remove_one_port(&serial_pxa_reg, &sport->port);
-
- clk_unprepare(sport->clk);
- clk_put(sport->clk);
- kfree(sport);
-
- return 0;
-}
-
-static struct platform_driver serial_pxa_driver = {
- .probe = serial_pxa_probe,
- .remove = serial_pxa_remove,
-
- .driver = {
- .name = "pxa2xx-uart",
- .owner = THIS_MODULE,
-#ifdef CONFIG_PM
- .pm = &serial_pxa_pm_ops,
-#endif
- .of_match_table = serial_pxa_dt_ids,
- },
-};
-
-static int __init serial_pxa_init(void)
-{
- int ret;
-
- ret = uart_register_driver(&serial_pxa_reg);
- if (ret != 0)
- return ret;
-
- ret = platform_driver_register(&serial_pxa_driver);
- if (ret != 0)
- uart_unregister_driver(&serial_pxa_reg);
-
- return ret;
-}
-
-static void __exit serial_pxa_exit(void)
-{
- platform_driver_unregister(&serial_pxa_driver);
- uart_unregister_driver(&serial_pxa_reg);
-}
-
-module_init(serial_pxa_init);
-module_exit(serial_pxa_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:pxa2xx-uart");
--
1.8.4.2
--
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