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linux-next/arch/arm/mach-ixp4xx/common.c
Linus Walleij 65af666713 ARM: ixp4xx: Switch to use new timer driver 
This augments the IXP4xx to select and use the new
timer driver in drivers/clocksource and removes the old
code in the machine.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-04-23 16:02:14 +02:00

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/*
* arch/arm/mach-ixp4xx/common.c
*
* Generic code shared across all IXP4XX platforms
*
* Maintainer: Deepak Saxena <dsaxena@plexity.net>
*
* Copyright 2002 (c) Intel Corporation
* Copyright 2003-2004 (c) MontaVista, Software, Inc.
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/export.h>
#include <linux/cpu.h>
#include <linux/pci.h>
#include <linux/sched_clock.h>
#include <linux/bitops.h>
#include <linux/irqchip/irq-ixp4xx.h>
#include <linux/platform_data/timer-ixp4xx.h>
#include <mach/udc.h>
#include <mach/hardware.h>
#include <mach/io.h>
#include <linux/uaccess.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/exception.h>
#include <asm/irq.h>
#include <asm/system_misc.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include "irqs.h"
#define IXP4XX_TIMER_FREQ 66666000
/*************************************************************************
* IXP4xx chipset I/O mapping
*************************************************************************/
static struct map_desc ixp4xx_io_desc[] __initdata = {
{ /* UART, Interrupt ctrl, GPIO, timers, NPEs, MACs, USB .... */
.virtual = (unsigned long)IXP4XX_PERIPHERAL_BASE_VIRT,
.pfn = __phys_to_pfn(IXP4XX_PERIPHERAL_BASE_PHYS),
.length = IXP4XX_PERIPHERAL_REGION_SIZE,
.type = MT_DEVICE
}, { /* Expansion Bus Config Registers */
.virtual = (unsigned long)IXP4XX_EXP_CFG_BASE_VIRT,
.pfn = __phys_to_pfn(IXP4XX_EXP_CFG_BASE_PHYS),
.length = IXP4XX_EXP_CFG_REGION_SIZE,
.type = MT_DEVICE
}, { /* PCI Registers */
.virtual = (unsigned long)IXP4XX_PCI_CFG_BASE_VIRT,
.pfn = __phys_to_pfn(IXP4XX_PCI_CFG_BASE_PHYS),
.length = IXP4XX_PCI_CFG_REGION_SIZE,
.type = MT_DEVICE
}, { /* Queue Manager */
.virtual = (unsigned long)IXP4XX_QMGR_BASE_VIRT,
.pfn = __phys_to_pfn(IXP4XX_QMGR_BASE_PHYS),
.length = IXP4XX_QMGR_REGION_SIZE,
.type = MT_DEVICE
},
};
void __init ixp4xx_map_io(void)
{
iotable_init(ixp4xx_io_desc, ARRAY_SIZE(ixp4xx_io_desc));
}
void __init ixp4xx_init_irq(void)
{
/*
* ixp4xx does not implement the XScale PWRMODE register
* so it must not call cpu_do_idle().
*/
cpu_idle_poll_ctrl(true);
ixp4xx_irq_init(IXP4XX_INTC_BASE_PHYS,
(cpu_is_ixp46x() || cpu_is_ixp43x()));
}
void __init ixp4xx_timer_init(void)
{
return ixp4xx_timer_setup(IXP4XX_TIMER_BASE_PHYS,
IRQ_IXP4XX_TIMER1,
IXP4XX_TIMER_FREQ);
}
static struct pxa2xx_udc_mach_info ixp4xx_udc_info;
void __init ixp4xx_set_udc_info(struct pxa2xx_udc_mach_info *info)
{
memcpy(&ixp4xx_udc_info, info, sizeof *info);
}
static struct resource ixp4xx_udc_resources[] = {
[0] = {
.start = 0xc800b000,
.end = 0xc800bfff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_IXP4XX_USB,
.end = IRQ_IXP4XX_USB,
.flags = IORESOURCE_IRQ,
},
};
static struct resource ixp4xx_gpio_resource[] = {
{
.start = IXP4XX_GPIO_BASE_PHYS,
.end = IXP4XX_GPIO_BASE_PHYS + 0xfff,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device ixp4xx_gpio_device = {
.name = "ixp4xx-gpio",
.id = -1,
.dev = {
.coherent_dma_mask = DMA_BIT_MASK(32),
},
.resource = ixp4xx_gpio_resource,
.num_resources = ARRAY_SIZE(ixp4xx_gpio_resource),
};
/*
* USB device controller. The IXP4xx uses the same controller as PXA25X,
* so we just use the same device.
*/
static struct platform_device ixp4xx_udc_device = {
.name = "pxa25x-udc",
.id = -1,
.num_resources = 2,
.resource = ixp4xx_udc_resources,
.dev = {
.platform_data = &ixp4xx_udc_info,
},
};
static struct platform_device *ixp4xx_devices[] __initdata = {
&ixp4xx_gpio_device,
&ixp4xx_udc_device,
};
static struct resource ixp46x_i2c_resources[] = {
[0] = {
.start = 0xc8011000,
.end = 0xc801101c,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_IXP4XX_I2C,
.end = IRQ_IXP4XX_I2C,
.flags = IORESOURCE_IRQ
}
};
/*
* I2C controller. The IXP46x uses the same block as the IOP3xx, so
* we just use the same device name.
*/
static struct platform_device ixp46x_i2c_controller = {
.name = "IOP3xx-I2C",
.id = 0,
.num_resources = 2,
.resource = ixp46x_i2c_resources
};
static struct platform_device *ixp46x_devices[] __initdata = {
&ixp46x_i2c_controller
};
unsigned long ixp4xx_exp_bus_size;
EXPORT_SYMBOL(ixp4xx_exp_bus_size);
void __init ixp4xx_sys_init(void)
{
ixp4xx_exp_bus_size = SZ_16M;
platform_add_devices(ixp4xx_devices, ARRAY_SIZE(ixp4xx_devices));
if (cpu_is_ixp46x()) {
int region;
platform_add_devices(ixp46x_devices,
ARRAY_SIZE(ixp46x_devices));
for (region = 0; region < 7; region++) {
if((*(IXP4XX_EXP_REG(0x4 * region)) & 0x200)) {
ixp4xx_exp_bus_size = SZ_32M;
break;
}
}
}
printk("IXP4xx: Using %luMiB expansion bus window size\n",
ixp4xx_exp_bus_size >> 20);
}
unsigned long ixp4xx_timer_freq = IXP4XX_TIMER_FREQ;
EXPORT_SYMBOL(ixp4xx_timer_freq);
void ixp4xx_restart(enum reboot_mode mode, const char *cmd)
{
if (mode == REBOOT_SOFT) {
/* Jump into ROM at address 0 */
soft_restart(0);
} else {
/* Use on-chip reset capability */
/* set the "key" register to enable access to
* "timer" and "enable" registers
*/
*IXP4XX_OSWK = IXP4XX_WDT_KEY;
/* write 0 to the timer register for an immediate reset */
*IXP4XX_OSWT = 0;
*IXP4XX_OSWE = IXP4XX_WDT_RESET_ENABLE | IXP4XX_WDT_COUNT_ENABLE;
}
}
#ifdef CONFIG_PCI
static int ixp4xx_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size)
{
return (dma_addr + size) > SZ_64M;
}
static int ixp4xx_platform_notify_remove(struct device *dev)
{
if (dev_is_pci(dev))
dmabounce_unregister_dev(dev);
return 0;
}
#endif
/*
* Setup DMA mask to 64MB on PCI devices and 4 GB on all other things.
*/
static int ixp4xx_platform_notify(struct device *dev)
{
dev->dma_mask = &dev->coherent_dma_mask;
#ifdef CONFIG_PCI
if (dev_is_pci(dev)) {
dev->coherent_dma_mask = DMA_BIT_MASK(28); /* 64 MB */
dmabounce_register_dev(dev, 2048, 4096, ixp4xx_needs_bounce);
return 0;
}
#endif
dev->coherent_dma_mask = DMA_BIT_MASK(32);
return 0;
}
int dma_set_coherent_mask(struct device *dev, u64 mask)
{
if (dev_is_pci(dev))
mask &= DMA_BIT_MASK(28); /* 64 MB */
if ((mask & DMA_BIT_MASK(28)) == DMA_BIT_MASK(28)) {
dev->coherent_dma_mask = mask;
return 0;
}
return -EIO; /* device wanted sub-64MB mask */
}
EXPORT_SYMBOL(dma_set_coherent_mask);
#ifdef CONFIG_IXP4XX_INDIRECT_PCI
/*
* In the case of using indirect PCI, we simply return the actual PCI
* address and our read/write implementation use that to drive the
* access registers. If something outside of PCI is ioremap'd, we
* fallback to the default.
*/
static void __iomem *ixp4xx_ioremap_caller(phys_addr_t addr, size_t size,
unsigned int mtype, void *caller)
{
if (!is_pci_memory(addr))
return __arm_ioremap_caller(addr, size, mtype, caller);
return (void __iomem *)addr;
}
static void ixp4xx_iounmap(volatile void __iomem *addr)
{
if (!is_pci_memory((__force u32)addr))
__iounmap(addr);
}
#endif
void __init ixp4xx_init_early(void)
{
platform_notify = ixp4xx_platform_notify;
#ifdef CONFIG_PCI
platform_notify_remove = ixp4xx_platform_notify_remove;
#endif
#ifdef CONFIG_IXP4XX_INDIRECT_PCI
arch_ioremap_caller = ixp4xx_ioremap_caller;
arch_iounmap = ixp4xx_iounmap;
#endif
}
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