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Date: Fri, 18 Jan 2013 17:54:44 +0530
From: Vineet Gupta <Vineet.Gupta1@...opsys.com>
To: <linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <arnd@...db.de>, Vineet Gupta <Vineet.Gupta1@...opsys.com>
Subject: [PATCH v2 30/76] ARC: [plat-arcfpga] Static platform device for CONFIG_SERIAL_ARC
N.B. This is old style of hardcoding platform device specific info
in code and it's instantiation thererof using platform_add_devices().
Subsequent patches replace this with DeviceTree based runtime probe.
This patch has been retained just as an example of "don't-do-this" for
newer kernel ports.
Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
Cc: Arnd Bergmann <arnd@...db.de>
---
arch/arc/include/asm/irq.h | 1 +
arch/arc/plat-arcfpga/include/plat/irq.h | 27 +++++++
arch/arc/plat-arcfpga/include/plat/memmap.h | 31 ++++++++
arch/arc/plat-arcfpga/platform.c | 108 +++++++++++++++++++++++++++
4 files changed, 167 insertions(+), 0 deletions(-)
create mode 100644 arch/arc/plat-arcfpga/include/plat/irq.h
create mode 100644 arch/arc/plat-arcfpga/include/plat/memmap.h
diff --git a/arch/arc/include/asm/irq.h b/arch/arc/include/asm/irq.h
index 514b302..c91b2e4 100644
--- a/arch/arc/include/asm/irq.h
+++ b/arch/arc/include/asm/irq.h
@@ -13,6 +13,7 @@
#define TIMER0_IRQ 3
#define TIMER1_IRQ 4
+#include <plat/irq.h> /* Board Specific IRQ assignments */
#include <asm-generic/irq.h>
extern void __init arc_init_IRQ(void);
diff --git a/arch/arc/plat-arcfpga/include/plat/irq.h b/arch/arc/plat-arcfpga/include/plat/irq.h
new file mode 100644
index 0000000..b34e087
--- /dev/null
+++ b/arch/arc/plat-arcfpga/include/plat/irq.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * vineetg: Feb 2009
+ * -For AA4 board, IRQ assignments to peripherals
+ */
+
+#ifndef __PLAT_IRQ_H
+#define __PLAT_IRQ_H
+
+#define NR_IRQS 16
+
+#define UART0_IRQ 5
+#define UART1_IRQ 10
+#define UART2_IRQ 11
+
+#define VMAC_IRQ 6
+
+#define IDE_IRQ 13
+#define PCI_IRQ 14
+#define PS2_IRQ 15
+
+#endif
diff --git a/arch/arc/plat-arcfpga/include/plat/memmap.h b/arch/arc/plat-arcfpga/include/plat/memmap.h
new file mode 100644
index 0000000..1663f33
--- /dev/null
+++ b/arch/arc/plat-arcfpga/include/plat/memmap.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * vineetg: Feb 2009
+ * -For AA4 board, System Memory Map for Peripherals etc
+ */
+
+#ifndef __PLAT_MEMMAP_H
+#define __PLAT_MEMMAP_H
+
+#define UART0_BASE 0xC0FC1000
+#define UART1_BASE 0xC0FC1100
+
+#define VMAC_REG_BASEADDR 0xC0FC2000
+
+#define IDE_CONTROLLER_BASE 0xC0FC9000
+
+#define AHB_PCI_HOST_BRG_BASE 0xC0FD0000
+
+#define PGU_BASEADDR 0xC0FC8000
+#define VLCK_ADDR 0xC0FCF028
+
+#define BVCI_LAT_UNIT_BASE 0xC0FED000
+
+#define PS2_BASE_ADDR 0xC0FCC000
+
+#endif
diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c
index 7b5dcab..5388b31 100644
--- a/arch/arc/plat-arcfpga/platform.c
+++ b/arch/arc/plat-arcfpga/platform.c
@@ -10,7 +10,102 @@
#include <linux/types.h>
#include <linux/init.h>
+#include <linux/device.h>
#include <linux/platform_device.h>
+#include <linux/console.h>
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/clk.h>
+#include <plat/memmap.h>
+
+/*----------------------- Platform Devices -----------------------------*/
+
+#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE)
+
+static unsigned long arc_uart_info[] = {
+ CONFIG_ARC_SERIAL_BAUD, /* uart->baud */
+ -1, /* uart->port.uartclk */
+ -1, /* uart->is_emulated (runtime @running_on_hw) */
+ 0
+};
+
+#define ARC_UART_DEV(n) \
+ \
+static struct resource arc_uart##n##_res[] = { \
+ { \
+ .start = UART##n##_BASE, \
+ .end = UART##n##_BASE + 0xFF, \
+ .flags = IORESOURCE_MEM, \
+ }, \
+ { \
+ .start = UART##n##_IRQ, \
+ .end = UART##n##_IRQ, \
+ .flags = IORESOURCE_IRQ, \
+ }, \
+}; \
+ \
+static struct platform_device arc_uart##n##_dev = { \
+ .name = "arc-uart", \
+ .id = n, \
+ .num_resources = ARRAY_SIZE(arc_uart##n##_res), \
+ .resource = arc_uart##n##_res, \
+ .dev = { \
+ .platform_data = &arc_uart_info, \
+ }, \
+}
+
+ARC_UART_DEV(0);
+#if CONFIG_SERIAL_ARC_NR_PORTS > 1
+ARC_UART_DEV(1);
+#endif
+
+static struct platform_device *fpga_early_devs[] __initdata = {
+#if defined(CONFIG_SERIAL_ARC_CONSOLE)
+ &arc_uart0_dev,
+#endif
+};
+
+static void arc_fpga_serial_init(void)
+{
+ arc_uart_info[1] = arc_get_core_freq();
+
+ /* To let driver workaround ISS bug: baudh Reg can't be set to 0 */
+ arc_uart_info[2] = !running_on_hw;
+
+ early_platform_add_devices(fpga_early_devs,
+ ARRAY_SIZE(fpga_early_devs));
+
+ /*
+ * ARC console driver registers itself as an early platform driver
+ * of class "earlyprintk".
+ * Install it here, followed by probe of devices.
+ * The installation here doesn't require earlyprintk in command line
+ * To do so however, replace the lines below with
+ * parse_early_param();
+ * early_platform_driver_probe("earlyprintk", 1, 1);
+ * ^^
+ */
+ early_platform_driver_register_all("earlyprintk");
+ early_platform_driver_probe("earlyprintk", 1, 0);
+
+ /*
+ * This is to make sure that arc uart would be preferred console
+ * despite one/more of following:
+ * -command line lacked "console=ttyARC0" or
+ * -CONFIG_VT_CONSOLE was enabled (for no reason whatsoever)
+ * Note that this needs to be done after above early console is reg,
+ * otherwise the early console never gets a chance to run.
+ */
+ add_preferred_console("ttyARC", 0, "115200");
+}
+
+#else
+
+static void arc_fpga_serial_init(void)
+{
+}
+
+#endif /* CONFIG_SERIAL_ARC */
/*
* Early Platform Initialization called from setup_arch()
@@ -18,12 +113,25 @@
void __init arc_platform_early_init(void)
{
pr_info("[plat-arcfpga]: registering early dev resources\n");
+
+ arc_fpga_serial_init();
}
+static struct platform_device *fpga_devs[] __initdata = {
+#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE)
+ &arc_uart0_dev,
+#if CONFIG_SERIAL_ARC_NR_PORTS > 1
+ &arc_uart1_dev,
+#endif
+#endif
+};
+
int __init fpga_plat_init(void)
{
pr_info("[plat-arcfpga]: registering device resources\n");
+ platform_add_devices(fpga_devs, ARRAY_SIZE(fpga_devs));
+
return 0;
}
arch_initcall(fpga_plat_init);
--
1.7.4.1
--
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