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    Subject[PATCH v2 30/76] ARC: [plat-arcfpga] Static platform device for CONFIG_SERIAL_ARC
    Date
    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@synopsys.com>
    Cc: Arnd Bergmann <arnd@arndb.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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