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linux/arch/arm/mach-pxa/lubbock.c
David Brownell 38c677cb9a [ARM] 3739/1: genirq updates: irq_chip, add and use irq_chip.name 
Patch from David Brownell

ARM genirq cleanups/updates:

    - Start switching platforms to newer APIs
        * use "irq_chip" name, not "irqchip"
        * providing irq_chip.name

    - Show irq_chip.name in /proc/interrupts, like on x86.

This update a bit more than half of the ARM code.  The irq_chip.name
values were chosen to match docs (if I have them) or be otherwise
obvious ("FPGA", "CPLD", or matching the code).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-08-01 22:26:25 +01:00

532 lines
12 KiB
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/*
* linux/arch/arm/mach-pxa/lubbock.c
*
* Support for the Intel DBPXA250 Development Platform.
*
* Author: Nicolas Pitre
* Created: Jun 15, 2001
* Copyright: MontaVista Software Inc.
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/major.h>
#include <linux/fb.h>
#include <linux/interrupt.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
#include <asm/arch/pxa2xx_spi.h>
#include <asm/setup.h>
#include <asm/memory.h>
#include <asm/mach-types.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/sizes.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/flash.h>
#include <asm/hardware/sa1111.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/lubbock.h>
#include <asm/arch/udc.h>
#include <asm/arch/irda.h>
#include <asm/arch/pxafb.h>
#include <asm/arch/mmc.h>
#include "generic.h"
#define LUB_MISC_WR __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
{
unsigned long flags;
local_irq_save(flags);
LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
local_irq_restore(flags);
}
EXPORT_SYMBOL(lubbock_set_misc_wr);
static unsigned long lubbock_irq_enabled;
static void lubbock_mask_irq(unsigned int irq)
{
int lubbock_irq = (irq - LUBBOCK_IRQ(0));
LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
}
static void lubbock_unmask_irq(unsigned int irq)
{
int lubbock_irq = (irq - LUBBOCK_IRQ(0));
/* the irq can be acknowledged only if deasserted, so it's done here */
LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
}
static struct irq_chip lubbock_irq_chip = {
.name = "FPGA",
.ack = lubbock_mask_irq,
.mask = lubbock_mask_irq,
.unmask = lubbock_unmask_irq,
};
static void lubbock_irq_handler(unsigned int irq, struct irqdesc *desc,
struct pt_regs *regs)
{
unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
do {
GEDR(0) = GPIO_bit(0); /* clear our parent irq */
if (likely(pending)) {
irq = LUBBOCK_IRQ(0) + __ffs(pending);
desc = irq_desc + irq;
desc_handle_irq(irq, desc, regs);
}
pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
} while (pending);
}
static void __init lubbock_init_irq(void)
{
int irq;
pxa_init_irq();
/* setup extra lubbock irqs */
for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
set_irq_chip(irq, &lubbock_irq_chip);
set_irq_handler(irq, do_level_IRQ);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
}
set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
}
#ifdef CONFIG_PM
static int lubbock_irq_resume(struct sys_device *dev)
{
LUB_IRQ_MASK_EN = lubbock_irq_enabled;
return 0;
}
static struct sysdev_class lubbock_irq_sysclass = {
set_kset_name("cpld_irq"),
.resume = lubbock_irq_resume,
};
static struct sys_device lubbock_irq_device = {
.cls = &lubbock_irq_sysclass,
};
static int __init lubbock_irq_device_init(void)
{
int ret = sysdev_class_register(&lubbock_irq_sysclass);
if (ret == 0)
ret = sysdev_register(&lubbock_irq_device);
return ret;
}
device_initcall(lubbock_irq_device_init);
#endif
static int lubbock_udc_is_connected(void)
{
return (LUB_MISC_RD & (1 << 9)) == 0;
}
static struct pxa2xx_udc_mach_info udc_info __initdata = {
.udc_is_connected = lubbock_udc_is_connected,
// no D+ pullup; lubbock can't connect/disconnect in software
};
static struct platform_device lub_audio_device = {
.name = "pxa2xx-ac97",
.id = -1,
};
static struct resource sa1111_resources[] = {
[0] = {
.start = 0x10000000,
.end = 0x10001fff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = LUBBOCK_SA1111_IRQ,
.end = LUBBOCK_SA1111_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device sa1111_device = {
.name = "sa1111",
.id = -1,
.num_resources = ARRAY_SIZE(sa1111_resources),
.resource = sa1111_resources,
};
static struct resource smc91x_resources[] = {
[0] = {
.name = "smc91x-regs",
.start = 0x0c000c00,
.end = 0x0c0fffff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = LUBBOCK_ETH_IRQ,
.end = LUBBOCK_ETH_IRQ,
.flags = IORESOURCE_IRQ,
},
[2] = {
.name = "smc91x-attrib",
.start = 0x0e000000,
.end = 0x0e0fffff,
.flags = IORESOURCE_MEM,
},
};
/* ADS7846 is connected through SSP ... and if your board has J5 populated,
* you can select it to replace the ucb1400 by switching the touchscreen cable
* (to J5) and poking board registers (as done below). Else it's only useful
* for the temperature sensors.
*/
static struct resource pxa_ssp_resources[] = {
[0] = {
.start = __PREG(SSCR0_P(1)),
.end = __PREG(SSCR0_P(1)) + 0x14,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_SSP,
.end = IRQ_SSP,
.flags = IORESOURCE_IRQ,
},
};
static struct pxa2xx_spi_master pxa_ssp_master_info = {
.ssp_type = PXA25x_SSP,
.clock_enable = CKEN3_SSP,
.num_chipselect = 0,
};
static struct platform_device pxa_ssp = {
.name = "pxa2xx-spi",
.id = 1,
.resource = pxa_ssp_resources,
.num_resources = ARRAY_SIZE(pxa_ssp_resources),
.dev = {
.platform_data = &pxa_ssp_master_info,
},
};
static int lubbock_ads7846_pendown_state(void)
{
/* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
return 0;
}
static struct ads7846_platform_data ads_info = {
.model = 7846,
.vref_delay_usecs = 100, /* internal, no cap */
.get_pendown_state = lubbock_ads7846_pendown_state,
// .x_plate_ohms = 500, /* GUESS! */
// .y_plate_ohms = 500, /* GUESS! */
};
static void ads7846_cs(u32 command)
{
static const unsigned TS_nCS = 1 << 11;
lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
}
static struct pxa2xx_spi_chip ads_hw = {
.tx_threshold = 1,
.rx_threshold = 2,
.cs_control = ads7846_cs,
};
static struct spi_board_info spi_board_info[] __initdata = { {
.modalias = "ads7846",
.platform_data = &ads_info,
.controller_data = &ads_hw,
.irq = LUBBOCK_BB_IRQ,
.max_speed_hz = 120000 /* max sample rate at 3V */
* 26 /* command + data + overhead */,
.bus_num = 1,
.chip_select = 0,
},
};
static struct platform_device smc91x_device = {
.name = "smc91x",
.id = -1,
.num_resources = ARRAY_SIZE(smc91x_resources),
.resource = smc91x_resources,
};
static struct resource flash_resources[] = {
[0] = {
.start = 0x00000000,
.end = SZ_64M - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = 0x04000000,
.end = 0x04000000 + SZ_64M - 1,
.flags = IORESOURCE_MEM,
},
};
static struct mtd_partition lubbock_partitions[] = {
{
.name = "Bootloader",
.size = 0x00040000,
.offset = 0,
.mask_flags = MTD_WRITEABLE /* force read-only */
},{
.name = "Kernel",
.size = 0x00100000,
.offset = 0x00040000,
},{
.name = "Filesystem",
.size = MTDPART_SIZ_FULL,
.offset = 0x00140000
}
};
static struct flash_platform_data lubbock_flash_data[2] = {
{
.map_name = "cfi_probe",
.parts = lubbock_partitions,
.nr_parts = ARRAY_SIZE(lubbock_partitions),
}, {
.map_name = "cfi_probe",
.parts = NULL,
.nr_parts = 0,
}
};
static struct platform_device lubbock_flash_device[2] = {
{
.name = "pxa2xx-flash",
.id = 0,
.dev = {
.platform_data = &lubbock_flash_data[0],
},
.resource = &flash_resources[0],
.num_resources = 1,
},
{
.name = "pxa2xx-flash",
.id = 1,
.dev = {
.platform_data = &lubbock_flash_data[1],
},
.resource = &flash_resources[1],
.num_resources = 1,
},
};
static struct platform_device *devices[] __initdata = {
&sa1111_device,
&lub_audio_device,
&smc91x_device,
&lubbock_flash_device[0],
&lubbock_flash_device[1],
&pxa_ssp,
};
static struct pxafb_mach_info sharp_lm8v31 __initdata = {
.pixclock = 270000,
.xres = 640,
.yres = 480,
.bpp = 16,
.hsync_len = 1,
.left_margin = 3,
.right_margin = 3,
.vsync_len = 1,
.upper_margin = 0,
.lower_margin = 0,
.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.cmap_greyscale = 0,
.cmap_inverse = 0,
.cmap_static = 0,
.lccr0 = LCCR0_SDS,
.lccr3 = LCCR3_PCP | LCCR3_Acb(255),
};
#define MMC_POLL_RATE msecs_to_jiffies(1000)
static void lubbock_mmc_poll(unsigned long);
static irqreturn_t (*mmc_detect_int)(int, void *, struct pt_regs *);
static struct timer_list mmc_timer = {
.function = lubbock_mmc_poll,
};
static void lubbock_mmc_poll(unsigned long data)
{
unsigned long flags;
/* clear any previous irq state, then ... */
local_irq_save(flags);
LUB_IRQ_SET_CLR &= ~(1 << 0);
local_irq_restore(flags);
/* poll until mmc/sd card is removed */
if (LUB_IRQ_SET_CLR & (1 << 0))
mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
else {
(void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data, NULL);
enable_irq(LUBBOCK_SD_IRQ);
}
}
static irqreturn_t lubbock_detect_int(int irq, void *data, struct pt_regs *regs)
{
/* IRQ is level triggered; disable, and poll for removal */
disable_irq(irq);
mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
return mmc_detect_int(irq, data, regs);
}
static int lubbock_mci_init(struct device *dev,
irqreturn_t (*detect_int)(int, void *, struct pt_regs *),
void *data)
{
/* setup GPIO for PXA25x MMC controller */
pxa_gpio_mode(GPIO6_MMCCLK_MD);
pxa_gpio_mode(GPIO8_MMCCS0_MD);
/* detect card insert/eject */
mmc_detect_int = detect_int;
init_timer(&mmc_timer);
mmc_timer.data = (unsigned long) data;
return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
}
static int lubbock_mci_get_ro(struct device *dev)
{
return (LUB_MISC_RD & (1 << 2)) != 0;
}
static void lubbock_mci_exit(struct device *dev, void *data)
{
free_irq(LUBBOCK_SD_IRQ, data);
del_timer_sync(&mmc_timer);
}
static struct pxamci_platform_data lubbock_mci_platform_data = {
.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
.detect_delay = 1,
.init = lubbock_mci_init,
.get_ro = lubbock_mci_get_ro,
.exit = lubbock_mci_exit,
};
static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
{
unsigned long flags;
local_irq_save(flags);
if (mode & IR_SIRMODE) {
LUB_MISC_WR &= ~(1 << 4);
} else if (mode & IR_FIRMODE) {
LUB_MISC_WR |= 1 << 4;
}
local_irq_restore(flags);
}
static struct pxaficp_platform_data lubbock_ficp_platform_data = {
.transceiver_cap = IR_SIRMODE | IR_FIRMODE,
.transceiver_mode = lubbock_irda_transceiver_mode,
};
static void __init lubbock_init(void)
{
int flashboot = (LUB_CONF_SWITCHES & 1);
pxa_set_udc_info(&udc_info);
set_pxa_fb_info(&sharp_lm8v31);
pxa_set_mci_info(&lubbock_mci_platform_data);
pxa_set_ficp_info(&lubbock_ficp_platform_data);
lubbock_flash_data[0].width = lubbock_flash_data[1].width =
(BOOT_DEF & 1) ? 2 : 4;
/* Compensate for the nROMBT switch which swaps the flash banks */
printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
flashboot?"Flash":"ROM", flashboot);
lubbock_flash_data[flashboot^1].name = "application-flash";
lubbock_flash_data[flashboot].name = "boot-rom";
(void) platform_add_devices(devices, ARRAY_SIZE(devices));
spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
}
static struct map_desc lubbock_io_desc[] __initdata = {
{ /* CPLD */
.virtual = LUBBOCK_FPGA_VIRT,
.pfn = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
.length = 0x00100000,
.type = MT_DEVICE
}
};
static void __init lubbock_map_io(void)
{
pxa_map_io();
iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
/* SSP data pins */
pxa_gpio_mode(GPIO23_SCLK_MD);
pxa_gpio_mode(GPIO25_STXD_MD);
pxa_gpio_mode(GPIO26_SRXD_MD);
/* This enables the BTUART */
pxa_gpio_mode(GPIO42_BTRXD_MD);
pxa_gpio_mode(GPIO43_BTTXD_MD);
pxa_gpio_mode(GPIO44_BTCTS_MD);
pxa_gpio_mode(GPIO45_BTRTS_MD);
/* This is for the SMC chip select */
pxa_gpio_mode(GPIO79_nCS_3_MD);
/* setup sleep mode values */
PWER = 0x00000002;
PFER = 0x00000000;
PRER = 0x00000002;
PGSR0 = 0x00008000;
PGSR1 = 0x003F0202;
PGSR2 = 0x0001C000;
PCFR |= PCFR_OPDE;
}
MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
/* Maintainer: MontaVista Software Inc. */
.phys_io = 0x40000000,
.io_pg_offst = (io_p2v(0x40000000) >> 18) & 0xfffc,
.map_io = lubbock_map_io,
.init_irq = lubbock_init_irq,
.timer = &pxa_timer,
.init_machine = lubbock_init,
MACHINE_END
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