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alistair23-linux/arch/arm/mach-pxa/lubbock.c
Eric Miao 7053acbd78 [ARM] 4304/1: removes the unnecessary bit number from CKENnn_XXXX 
This patch removes the unnecessary bit number from CKENnn_XXXX
definitions for PXA, so that

	CKEN0_PWM0 --> CKEN_PWM0
	CKEN1_PWM1 --> CKEN_PWM1
	...
	CKEN24_CAMERA --> CKEN_CAMERA

The reasons for the change of these defitions are:

1. they do not scale - they are currently valid for pxa2xx, but
definitely not valid for pxa3xx, e.g., pxa3xx has bit 3 for camera
instead of bit 24

2. they are unnecessary - the peripheral name within the definition
has already announced its usage, we don't need those bit numbers
to know which peripheral we are going to enable/disable clock for

3. they are inconvenient - think about this: a driver programmer
for pxa has to remember which bit in the CKEN register to turn
on/off

Another change in the patch is to make the definitions equal to its
clock bit index, so that

   #define CKEN_CAMERA  (24)

instead of

   #define CKEN_CAMERA  (1 << 24)

this change, however, will add a run-time bit shift operation in
pxa_set_cken(), but the benefit of this change is that it scales
when bit index exceeds 32, e.g., pxa3xx has two registers CKENA
and CKENB, totally 64 bit for this, suppose CAMERA clock enabling
bit is CKENB:10, one can simply define CKEN_CAMERA to be (32 + 10)
and so that pxa_set_cken() need minimum change to adapt to that.

Signed-off-by: eric miao <eric.y.miao@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-04-21 23:14:01 +01:00

536 lines
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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 irq_desc *desc)
{
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);
}
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, handle_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 = CKEN_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_mode_info sharp_lm8v31_mode = {
.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,
};
static struct pxafb_mach_info sharp_lm8v31 = {
.modes = &sharp_lm8v31_mode,
.num_modes = 1,
.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 irq_handler_t mmc_detect_int;
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);
enable_irq(LUBBOCK_SD_IRQ);
}
}
static irqreturn_t lubbock_detect_int(int irq, void *data)
{
/* 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);
}
static int lubbock_mci_init(struct device *dev,
irq_handler_t detect_int,
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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