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linux/arch/arm/mach-realview/core.c
Russell King fb593cf38f clocksource: ARM sp804: allow clocksource name to be specified 
This allows platforms to specify the clocksource name upon
registration, which is necessary should they wish to register more
than one sp804 clocksource.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-05-23 18:04:53 +01:00

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/*
* linux/arch/arm/mach-realview/core.c
*
* Copyright (C) 1999 - 2003 ARM Limited
* Copyright (C) 2000 Deep Blue Solutions Ltd
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/sysdev.h>
#include <linux/interrupt.h>
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
#include <linux/io.h>
#include <linux/smsc911x.h>
#include <linux/ata_platform.h>
#include <linux/amba/mmci.h>
#include <linux/gfp.h>
#include <linux/clkdev.h>
#include <asm/system.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/leds.h>
#include <asm/mach-types.h>
#include <asm/hardware/arm_timer.h>
#include <asm/hardware/icst.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
#include <asm/hardware/gic.h>
#include <mach/platform.h>
#include <mach/irqs.h>
#include <asm/hardware/timer-sp.h>
#include <plat/clcd.h>
#include <plat/sched_clock.h>
#include "core.h"
#ifdef CONFIG_ZONE_DMA
/*
* Adjust the zones if there are restrictions for DMA access.
*/
void __init realview_adjust_zones(unsigned long *size, unsigned long *hole)
{
unsigned long dma_size = SZ_256M >> PAGE_SHIFT;
if (!machine_is_realview_pbx() || size[0] <= dma_size)
return;
size[ZONE_NORMAL] = size[0] - dma_size;
size[ZONE_DMA] = dma_size;
hole[ZONE_NORMAL] = hole[0];
hole[ZONE_DMA] = 0;
}
#endif
#define REALVIEW_FLASHCTRL (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET)
static int realview_flash_init(void)
{
u32 val;
val = __raw_readl(REALVIEW_FLASHCTRL);
val &= ~REALVIEW_FLASHPROG_FLVPPEN;
__raw_writel(val, REALVIEW_FLASHCTRL);
return 0;
}
static void realview_flash_exit(void)
{
u32 val;
val = __raw_readl(REALVIEW_FLASHCTRL);
val &= ~REALVIEW_FLASHPROG_FLVPPEN;
__raw_writel(val, REALVIEW_FLASHCTRL);
}
static void realview_flash_set_vpp(int on)
{
u32 val;
val = __raw_readl(REALVIEW_FLASHCTRL);
if (on)
val |= REALVIEW_FLASHPROG_FLVPPEN;
else
val &= ~REALVIEW_FLASHPROG_FLVPPEN;
__raw_writel(val, REALVIEW_FLASHCTRL);
}
static struct flash_platform_data realview_flash_data = {
.map_name = "cfi_probe",
.width = 4,
.init = realview_flash_init,
.exit = realview_flash_exit,
.set_vpp = realview_flash_set_vpp,
};
struct platform_device realview_flash_device = {
.name = "armflash",
.id = 0,
.dev = {
.platform_data = &realview_flash_data,
},
};
int realview_flash_register(struct resource *res, u32 num)
{
realview_flash_device.resource = res;
realview_flash_device.num_resources = num;
return platform_device_register(&realview_flash_device);
}
static struct smsc911x_platform_config smsc911x_config = {
.flags = SMSC911X_USE_32BIT,
.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
.irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL,
.phy_interface = PHY_INTERFACE_MODE_MII,
};
static struct platform_device realview_eth_device = {
.name = "smsc911x",
.id = 0,
.num_resources = 2,
};
int realview_eth_register(const char *name, struct resource *res)
{
if (name)
realview_eth_device.name = name;
realview_eth_device.resource = res;
if (strcmp(realview_eth_device.name, "smsc911x") == 0)
realview_eth_device.dev.platform_data = &smsc911x_config;
return platform_device_register(&realview_eth_device);
}
struct platform_device realview_usb_device = {
.name = "isp1760",
.num_resources = 2,
};
int realview_usb_register(struct resource *res)
{
realview_usb_device.resource = res;
return platform_device_register(&realview_usb_device);
}
static struct pata_platform_info pata_platform_data = {
.ioport_shift = 1,
};
static struct resource pata_resources[] = {
[0] = {
.start = REALVIEW_CF_BASE,
.end = REALVIEW_CF_BASE + 0xff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = REALVIEW_CF_BASE + 0x100,
.end = REALVIEW_CF_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
};
struct platform_device realview_cf_device = {
.name = "pata_platform",
.id = -1,
.num_resources = ARRAY_SIZE(pata_resources),
.resource = pata_resources,
.dev = {
.platform_data = &pata_platform_data,
},
};
static struct resource realview_i2c_resource = {
.start = REALVIEW_I2C_BASE,
.end = REALVIEW_I2C_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
};
struct platform_device realview_i2c_device = {
.name = "versatile-i2c",
.id = 0,
.num_resources = 1,
.resource = &realview_i2c_resource,
};
static struct i2c_board_info realview_i2c_board_info[] = {
{
I2C_BOARD_INFO("ds1338", 0xd0 >> 1),
},
};
static int __init realview_i2c_init(void)
{
return i2c_register_board_info(0, realview_i2c_board_info,
ARRAY_SIZE(realview_i2c_board_info));
}
arch_initcall(realview_i2c_init);
#define REALVIEW_SYSMCI (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_MCI_OFFSET)
/*
* This is only used if GPIOLIB support is disabled
*/
static unsigned int realview_mmc_status(struct device *dev)
{
struct amba_device *adev = container_of(dev, struct amba_device, dev);
u32 mask;
if (machine_is_realview_pb1176()) {
static bool inserted = false;
/*
* The PB1176 does not have the status register,
* assume it is inserted at startup, then invert
* for each call so card insertion/removal will
* be detected anyway. This will not be called if
* GPIO on PL061 is active, which is the proper
* way to do this on the PB1176.
*/
inserted = !inserted;
return inserted ? 0 : 1;
}
if (adev->res.start == REALVIEW_MMCI0_BASE)
mask = 1;
else
mask = 2;
return readl(REALVIEW_SYSMCI) & mask;
}
struct mmci_platform_data realview_mmc0_plat_data = {
.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
.status = realview_mmc_status,
.gpio_wp = 17,
.gpio_cd = 16,
.cd_invert = true,
};
struct mmci_platform_data realview_mmc1_plat_data = {
.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
.status = realview_mmc_status,
.gpio_wp = 19,
.gpio_cd = 18,
.cd_invert = true,
};
/*
* Clock handling
*/
static const struct icst_params realview_oscvco_params = {
.ref = 24000000,
.vco_max = ICST307_VCO_MAX,
.vco_min = ICST307_VCO_MIN,
.vd_min = 4 + 8,
.vd_max = 511 + 8,
.rd_min = 1 + 2,
.rd_max = 127 + 2,
.s2div = icst307_s2div,
.idx2s = icst307_idx2s,
};
static void realview_oscvco_set(struct clk *clk, struct icst_vco vco)
{
void __iomem *sys_lock = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LOCK_OFFSET;
u32 val;
val = readl(clk->vcoreg) & ~0x7ffff;
val |= vco.v | (vco.r << 9) | (vco.s << 16);
writel(0xa05f, sys_lock);
writel(val, clk->vcoreg);
writel(0, sys_lock);
}
static const struct clk_ops oscvco_clk_ops = {
.round = icst_clk_round,
.set = icst_clk_set,
.setvco = realview_oscvco_set,
};
static struct clk oscvco_clk = {
.ops = &oscvco_clk_ops,
.params = &realview_oscvco_params,
};
/*
* These are fixed clocks.
*/
static struct clk ref24_clk = {
.rate = 24000000,
};
static struct clk dummy_apb_pclk;
static struct clk_lookup lookups[] = {
{ /* Bus clock */
.con_id = "apb_pclk",
.clk = &dummy_apb_pclk,
}, { /* UART0 */
.dev_id = "dev:uart0",
.clk = &ref24_clk,
}, { /* UART1 */
.dev_id = "dev:uart1",
.clk = &ref24_clk,
}, { /* UART2 */
.dev_id = "dev:uart2",
.clk = &ref24_clk,
}, { /* UART3 */
.dev_id = "fpga:uart3",
.clk = &ref24_clk,
}, { /* UART3 is on the dev chip in PB1176 */
.dev_id = "dev:uart3",
.clk = &ref24_clk,
}, { /* UART4 only exists in PB1176 */
.dev_id = "fpga:uart4",
.clk = &ref24_clk,
}, { /* KMI0 */
.dev_id = "fpga:kmi0",
.clk = &ref24_clk,
}, { /* KMI1 */
.dev_id = "fpga:kmi1",
.clk = &ref24_clk,
}, { /* MMC0 */
.dev_id = "fpga:mmc0",
.clk = &ref24_clk,
}, { /* CLCD is in the PB1176 and EB DevChip */
.dev_id = "dev:clcd",
.clk = &oscvco_clk,
}, { /* PB:CLCD */
.dev_id = "issp:clcd",
.clk = &oscvco_clk,
}, { /* SSP */
.dev_id = "dev:ssp0",
.clk = &ref24_clk,
}
};
void __init realview_init_early(void)
{
void __iomem *sys = __io_address(REALVIEW_SYS_BASE);
if (machine_is_realview_pb1176())
oscvco_clk.vcoreg = sys + REALVIEW_SYS_OSC0_OFFSET;
else
oscvco_clk.vcoreg = sys + REALVIEW_SYS_OSC4_OFFSET;
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
versatile_sched_clock_init(sys + REALVIEW_SYS_24MHz_OFFSET, 24000000);
}
/*
* CLCD support.
*/
#define SYS_CLCD_NLCDIOON (1 << 2)
#define SYS_CLCD_VDDPOSSWITCH (1 << 3)
#define SYS_CLCD_PWR3V5SWITCH (1 << 4)
#define SYS_CLCD_ID_MASK (0x1f << 8)
#define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
#define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
#define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
#define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8)
#define SYS_CLCD_ID_VGA (0x1f << 8)
/*
* Disable all display connectors on the interface module.
*/
static void realview_clcd_disable(struct clcd_fb *fb)
{
void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
u32 val;
val = readl(sys_clcd);
val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
writel(val, sys_clcd);
}
/*
* Enable the relevant connector on the interface module.
*/
static void realview_clcd_enable(struct clcd_fb *fb)
{
void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
u32 val;
/*
* Enable the PSUs
*/
val = readl(sys_clcd);
val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
writel(val, sys_clcd);
}
/*
* Detect which LCD panel is connected, and return the appropriate
* clcd_panel structure. Note: we do not have any information on
* the required timings for the 8.4in panel, so we presently assume
* VGA timings.
*/
static int realview_clcd_setup(struct clcd_fb *fb)
{
void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
const char *panel_name, *vga_panel_name;
unsigned long framesize;
u32 val;
if (machine_is_realview_eb()) {
/* VGA, 16bpp */
framesize = 640 * 480 * 2;
vga_panel_name = "VGA";
} else {
/* XVGA, 16bpp */
framesize = 1024 * 768 * 2;
vga_panel_name = "XVGA";
}
val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
if (val == SYS_CLCD_ID_SANYO_3_8)
panel_name = "Sanyo TM38QV67A02A";
else if (val == SYS_CLCD_ID_SANYO_2_5)
panel_name = "Sanyo QVGA Portrait";
else if (val == SYS_CLCD_ID_EPSON_2_2)
panel_name = "Epson L2F50113T00";
else if (val == SYS_CLCD_ID_VGA)
panel_name = vga_panel_name;
else {
pr_err("CLCD: unknown LCD panel ID 0x%08x, using VGA\n", val);
panel_name = vga_panel_name;
}
fb->panel = versatile_clcd_get_panel(panel_name);
if (!fb->panel)
return -EINVAL;
return versatile_clcd_setup_dma(fb, framesize);
}
struct clcd_board clcd_plat_data = {
.name = "RealView",
.caps = CLCD_CAP_ALL,
.check = clcdfb_check,
.decode = clcdfb_decode,
.disable = realview_clcd_disable,
.enable = realview_clcd_enable,
.setup = realview_clcd_setup,
.mmap = versatile_clcd_mmap_dma,
.remove = versatile_clcd_remove_dma,
};
#ifdef CONFIG_LEDS
#define VA_LEDS_BASE (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LED_OFFSET)
void realview_leds_event(led_event_t ledevt)
{
unsigned long flags;
u32 val;
u32 led = 1 << smp_processor_id();
local_irq_save(flags);
val = readl(VA_LEDS_BASE);
switch (ledevt) {
case led_idle_start:
val = val & ~led;
break;
case led_idle_end:
val = val | led;
break;
case led_timer:
val = val ^ REALVIEW_SYS_LED7;
break;
case led_halted:
val = 0;
break;
default:
break;
}
writel(val, VA_LEDS_BASE);
local_irq_restore(flags);
}
#endif /* CONFIG_LEDS */
/*
* Where is the timer (VA)?
*/
void __iomem *timer0_va_base;
void __iomem *timer1_va_base;
void __iomem *timer2_va_base;
void __iomem *timer3_va_base;
/*
* Set up the clock source and clock events devices
*/
void __init realview_timer_init(unsigned int timer_irq)
{
u32 val;
/*
* set clock frequency:
* REALVIEW_REFCLK is 32KHz
* REALVIEW_TIMCLK is 1MHz
*/
val = readl(__io_address(REALVIEW_SCTL_BASE));
writel((REALVIEW_TIMCLK << REALVIEW_TIMER1_EnSel) |
(REALVIEW_TIMCLK << REALVIEW_TIMER2_EnSel) |
(REALVIEW_TIMCLK << REALVIEW_TIMER3_EnSel) |
(REALVIEW_TIMCLK << REALVIEW_TIMER4_EnSel) | val,
__io_address(REALVIEW_SCTL_BASE));
/*
* Initialise to a known state (all timers off)
*/
writel(0, timer0_va_base + TIMER_CTRL);
writel(0, timer1_va_base + TIMER_CTRL);
writel(0, timer2_va_base + TIMER_CTRL);
writel(0, timer3_va_base + TIMER_CTRL);
sp804_clocksource_init(timer3_va_base, "timer3");
sp804_clockevents_init(timer0_va_base, timer_irq);
}
/*
* Setup the memory banks.
*/
void realview_fixup(struct machine_desc *mdesc, struct tag *tags, char **from,
struct meminfo *meminfo)
{
/*
* Most RealView platforms have 512MB contiguous RAM at 0x70000000.
* Half of this is mirrored at 0.
*/
#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
meminfo->bank[0].start = 0x70000000;
meminfo->bank[0].size = SZ_512M;
meminfo->nr_banks = 1;
#else
meminfo->bank[0].start = 0;
meminfo->bank[0].size = SZ_256M;
meminfo->nr_banks = 1;
#endif
}
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