- 根目录:
- arch
- arm
- mach-sa1100
- assabet.c
/*
* linux/arch/arm/mach-sa1100/assabet.c
*
* Author: Nicolas Pitre
*
* This file contains all Assabet-specific tweaks.
*
* 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/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/platform_data/sa11x0-serial.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/mfd/ucb1x00.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <video/sa1100fb.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/irda.h>
#include <asm/mach/map.h>
#include <mach/assabet.h>
#include <linux/platform_data/mfd-mcp-sa11x0.h>
#include <mach/irqs.h>
#include "generic.h"
#define ASSABET_BCR_DB1110 \
(ASSABET_BCR_SPK_OFF | \
ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
ASSABET_BCR_IRDA_MD0)
#define ASSABET_BCR_DB1111 \
(ASSABET_BCR_SPK_OFF | \
ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
ASSABET_BCR_IRDA_MD0 | ASSABET_BCR_CF_RST)
unsigned long SCR_value = ASSABET_SCR_INIT;
EXPORT_SYMBOL(SCR_value);
static unsigned long BCR_value = ASSABET_BCR_DB1110;
void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
{
unsigned long flags;
local_irq_save(flags);
BCR_value = (BCR_value & ~mask) | val;
ASSABET_BCR = BCR_value;
local_irq_restore(flags);
}
EXPORT_SYMBOL(ASSABET_BCR_frob);
static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
{
if (state == UCB_RST_PROBE)
ASSABET_BCR_set(ASSABET_BCR_CODEC_RST);
}
/*
* Assabet flash support code.
*/
#ifdef ASSABET_REV_4
/*
* Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
*/
static struct mtd_partition assabet_partitions[] = {
{
.name = "bootloader",
.size = 0x00020000,
.offset = 0,
.mask_flags = MTD_WRITEABLE,
}, {
.name = "bootloader params",
.size = 0x00020000,
.offset = MTDPART_OFS_APPEND,
.mask_flags = MTD_WRITEABLE,
}, {
.name = "jffs",
.size = MTDPART_SIZ_FULL,
.offset = MTDPART_OFS_APPEND,
}
};
#else
/*
* Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
*/
static struct mtd_partition assabet_partitions[] = {
{
.name = "bootloader",
.size = 0x00040000,
.offset = 0,
.mask_flags = MTD_WRITEABLE,
}, {
.name = "bootloader params",
.size = 0x00040000,
.offset = MTDPART_OFS_APPEND,
.mask_flags = MTD_WRITEABLE,
}, {
.name = "jffs",
.size = MTDPART_SIZ_FULL,
.offset = MTDPART_OFS_APPEND,
}
};
#endif
static struct flash_platform_data assabet_flash_data = {
.map_name = "cfi_probe",
.parts = assabet_partitions,
.nr_parts = ARRAY_SIZE(assabet_partitions),
};
static struct resource assabet_flash_resources[] = {
DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
};
/*
* Assabet IrDA support code.
*/
static int assabet_irda_set_power(struct device *dev, unsigned int state)
{
static unsigned int bcr_state[4] = {
ASSABET_BCR_IRDA_MD0,
ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
ASSABET_BCR_IRDA_MD1,
0
};
if (state < 4) {
state = bcr_state[state];
ASSABET_BCR_clear(state ^ (ASSABET_BCR_IRDA_MD1|
ASSABET_BCR_IRDA_MD0));
ASSABET_BCR_set(state);
}
return 0;
}
static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
{
if (speed < 4000000)
ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
else
ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
}
static struct irda_platform_data assabet_irda_data = {
.set_power = assabet_irda_set_power,
.set_speed = assabet_irda_set_speed,
};
static struct ucb1x00_plat_data assabet_ucb1x00_data = {
.reset = assabet_ucb1x00_reset,
.gpio_base = -1,
};
static struct mcp_plat_data assabet_mcp_data = {
.mccr0 = MCCR0_ADM,
.sclk_rate = 11981000,
.codec_pdata = &assabet_ucb1x00_data,
};
static void assabet_lcd_set_visual(u32 visual)
{
u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;
if (machine_is_assabet()) {
#if 1 // phase 4 or newer Assabet's
if (is_true_color)
ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
else
ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
#else
// older Assabet's
if (is_true_color)
ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
else
ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
#endif
}
}
#ifndef ASSABET_PAL_VIDEO
static void assabet_lcd_backlight_power(int on)
{
if (on)
ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
else
ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
}
/*
* Turn on/off the backlight. When turning the backlight on, we wait
* 500us after turning it on so we don't cause the supplies to droop
* when we enable the LCD controller (and cause a hard reset.)
*/
static void assabet_lcd_power(int on)
{
if (on) {
ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
udelay(500);
} else
ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
}
/*
* The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually
* takes an RGB666 signal, but we provide it with an RGB565 signal
* instead (def_rgb_16).
*/
static struct sa1100fb_mach_info lq039q2ds54_info = {
.pixclock = 171521, .bpp = 16,
.xres = 320, .yres = 240,
.hsync_len = 5, .vsync_len = 1,
.left_margin = 61, .upper_margin = 3,
.right_margin = 9, .lower_margin = 0,
.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
.lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
.backlight_power = assabet_lcd_backlight_power,
.lcd_power = assabet_lcd_power,
.set_visual = assabet_lcd_set_visual,
};
#else
static void assabet_pal_backlight_power(int on)
{
ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
}
static void assabet_pal_power(int on)
{
ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
}
static struct sa1100fb_mach_info pal_info = {
.pixclock = 67797, .bpp = 16,
.xres = 640, .yres = 512,
.hsync_len = 64, .vsync_len = 6,
.left_margin = 125, .upper_margin = 70,
.right_margin = 115, .lower_margin = 36,
.lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
.lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
.backlight_power = assabet_pal_backlight_power,
.lcd_power = assabet_pal_power,
.set_visual = assabet_lcd_set_visual,
};
#endif
#ifdef CONFIG_ASSABET_NEPONSET
static struct resource neponset_resources[] = {
DEFINE_RES_MEM(0x10000000, 0x08000000),
DEFINE_RES_MEM(0x18000000, 0x04000000),
DEFINE_RES_MEM(0x40000000, SZ_8K),
DEFINE_RES_IRQ(IRQ_GPIO25),
};
#endif
static void __init assabet_init(void)
{
/*
* Ensure that the power supply is in "high power" mode.
*/
GPSR = GPIO_GPIO16;
GPDR |= GPIO_GPIO16;
/*
* Ensure that these pins are set as outputs and are driving
* logic 0. This ensures that we won't inadvertently toggle
* the WS latch in the CPLD, and we don't float causing
* excessive power drain. --rmk
*/
GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
/*
* Also set GPIO27 as an output; this is used to clock UART3
* via the FPGA and as otherwise has no pullups or pulldowns,
* so stop it floating.
*/
GPCR = GPIO_GPIO27;
GPDR |= GPIO_GPIO27;
/*
* Set up registers for sleep mode.
*/
PWER = PWER_GPIO0;
PGSR = 0;
PCFR = 0;
PSDR = 0;
PPDR |= PPC_TXD3 | PPC_TXD1;
PPSR |= PPC_TXD3 | PPC_TXD1;
sa11x0_ppc_configure_mcp();
if (machine_has_neponset()) {
/*
* Angel sets this, but other bootloaders may not.
*
* This must precede any driver calls to BCR_set()
* or BCR_clear().
*/
ASSABET_BCR = BCR_value = ASSABET_BCR_DB1111;
#ifndef CONFIG_ASSABET_NEPONSET
printk( "Warning: Neponset detected but full support "
"hasn't been configured in the kernel\n" );
#else
platform_device_register_simple("neponset", 0,
neponset_resources, ARRAY_SIZE(neponset_resources));
#endif
}
#ifndef ASSABET_PAL_VIDEO
sa11x0_register_lcd(&lq039q2ds54_info);
#else
sa11x0_register_lcd(&pal_video);
#endif
sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
ARRAY_SIZE(assabet_flash_resources));
sa11x0_register_irda(&assabet_irda_data);
sa11x0_register_mcp(&assabet_mcp_data);
}
/*
* On Assabet, we must probe for the Neponset board _before_
* paging_init() has occurred to actually determine the amount
* of RAM available. To do so, we map the appropriate IO section
* in the page table here in order to access GPIO registers.
*/
static void __init map_sa1100_gpio_regs( void )
{
unsigned long phys = __PREG(GPLR) & PMD_MASK;
unsigned long virt = (unsigned long)io_p2v(phys);
int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
pmd_t *pmd;
pmd = pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
*pmd = __pmd(phys | prot);
flush_pmd_entry(pmd);
}
/*
* Read System Configuration "Register"
* (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
* User's Guide", section 4.4.1)
*
* This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
* to set up the serial port for decompression status messages. We
* repeat it here because the kernel may not be loaded as a zImage, and
* also because it's a hassle to communicate the SCR value to the kernel
* from the decompressor.
*
* Note that IRQs are guaranteed to be disabled.
*/
static void __init get_assabet_scr(void)
{
unsigned long uninitialized_var(scr), i;
GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
for(i = 100; i--; ) /* Read GPIO 9:2 */
scr = GPLR;
GPDR |= 0x3fc; /* restore correct pin direction */
scr &= 0x3fc; /* save as system configuration byte. */
SCR_value = scr;
}
static void __init
fixup_assabet(struct tag *tags, char **cmdline, struct meminfo *mi)
{
/* This must be done before any call to machine_has_neponset() */
map_sa1100_gpio_regs();
get_assabet_scr();
if (machine_has_neponset())
printk("Neponset expansion board detected\n");
}
static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
if (port->mapbase == _Ser1UTCR0) {
if (state)
ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
ASSABET_BCR_COM_RTS |
ASSABET_BCR_COM_DTR);
else
ASSABET_BCR_set(ASSABET_BCR_RS232EN |
ASSABET_BCR_COM_RTS |
ASSABET_BCR_COM_DTR);
}
}
/*
* Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
* and UART3 (radio module). We only handle them for UART1 here.
*/
static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
{
if (port->mapbase == _Ser1UTCR0) {
u_int set = 0, clear = 0;
if (mctrl & TIOCM_RTS)
clear |= ASSABET_BCR_COM_RTS;
else
set |= ASSABET_BCR_COM_RTS;
if (mctrl & TIOCM_DTR)
clear |= ASSABET_BCR_COM_DTR;
else
set |= ASSABET_BCR_COM_DTR;
ASSABET_BCR_clear(clear);
ASSABET_BCR_set(set);
}
}
static u_int assabet_get_mctrl(struct uart_port *port)
{
u_int ret = 0;
u_int bsr = ASSABET_BSR;
/* need 2 reads to read current value */
bsr = ASSABET_BSR;
if (port->mapbase == _Ser1UTCR0) {
if (bsr & ASSABET_BSR_COM_DCD)
ret |= TIOCM_CD;
if (bsr & ASSABET_BSR_COM_CTS)
ret |= TIOCM_CTS;
if (bsr & ASSABET_BSR_COM_DSR)
ret |= TIOCM_DSR;
} else if (port->mapbase == _Ser3UTCR0) {
if (bsr & ASSABET_BSR_RAD_DCD)
ret |= TIOCM_CD;
if (bsr & ASSABET_BSR_RAD_CTS)
ret |= TIOCM_CTS;
if (bsr & ASSABET_BSR_RAD_DSR)
ret |= TIOCM_DSR;
if (bsr & ASSABET_BSR_RAD_RI)
ret |= TIOCM_RI;
} else {
ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
}
return ret;
}
static struct sa1100_port_fns assabet_port_fns __initdata = {
.set_mctrl = assabet_set_mctrl,
.get_mctrl = assabet_get_mctrl,
.pm = assabet_uart_pm,
};
static struct map_desc assabet_io_desc[] __initdata = {
{ /* Board Control Register */
.virtual = 0xf1000000,
.pfn = __phys_to_pfn(0x12000000),
.length = 0x00100000,
.type = MT_DEVICE
}, { /* MQ200 */
.virtual = 0xf2800000,
.pfn = __phys_to_pfn(0x4b800000),
.length = 0x00800000,
.type = MT_DEVICE
}
};
static void __init assabet_map_io(void)
{
sa1100_map_io();
iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
/*
* Set SUS bit in SDCR0 so serial port 1 functions.
* Its called GPCLKR0 in my SA1110 manual.
*/
Ser1SDCR0 |= SDCR0_SUS;
if (!machine_has_neponset())
sa1100_register_uart_fns(&assabet_port_fns);
/*
* When Neponset is attached, the first UART should be
* UART3. That's what Angel is doing and many documents
* are stating this.
*
* We do the Neponset mapping even if Neponset support
* isn't compiled in so the user will still get something on
* the expected physical serial port.
*
* We no longer do this; not all boot loaders support it,
* and UART3 appears to be somewhat unreliable with blob.
*/
sa1100_register_uart(0, 1);
sa1100_register_uart(2, 3);
}
/* LEDs */
#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
struct assabet_led {
struct led_classdev cdev;
u32 mask;
};
/*
* The triggers lines up below will only be used if the
* LED triggers are compiled in.
*/
static const struct {
const char *name;
const char *trigger;
} assabet_leds[] = {
{ "assabet:red", "cpu0",},
{ "assabet:green", "heartbeat", },
};
/*
* The LED control in Assabet is reversed:
* - setting bit means turn off LED
* - clearing bit means turn on LED
*/
static void assabet_led_set(struct led_classdev *cdev,
enum led_brightness b)
{
struct assabet_led *led = container_of(cdev,
struct assabet_led, cdev);
if (b != LED_OFF)
ASSABET_BCR_clear(led->mask);
else
ASSABET_BCR_set(led->mask);
}
static enum led_brightness assabet_led_get(struct led_classdev *cdev)
{
struct assabet_led *led = container_of(cdev,
struct assabet_led, cdev);
return (ASSABET_BCR & led->mask) ? LED_OFF : LED_FULL;
}
static int __init assabet_leds_init(void)
{
int i;
if (!machine_is_assabet())
return -ENODEV;
for (i = 0; i < ARRAY_SIZE(assabet_leds); i++) {
struct assabet_led *led;
led = kzalloc(sizeof(*led), GFP_KERNEL);
if (!led)
break;
led->cdev.name = assabet_leds[i].name;
led->cdev.brightness_set = assabet_led_set;
led->cdev.brightness_get = assabet_led_get;
led->cdev.default_trigger = assabet_leds[i].trigger;
if (!i)
led->mask = ASSABET_BCR_LED_RED;
else
led->mask = ASSABET_BCR_LED_GREEN;
if (led_classdev_register(NULL, &led->cdev) < 0) {
kfree(led);
break;
}
}
return 0;
}
/*
* Since we may have triggers on any subsystem, defer registration
* until after subsystem_init.
*/
fs_initcall(assabet_leds_init);
#endif
MACHINE_START(ASSABET, "Intel-Assabet")
.atag_offset = 0x100,
.fixup = fixup_assabet,
.map_io = assabet_map_io,
.nr_irqs = SA1100_NR_IRQS,
.init_irq = sa1100_init_irq,
.init_time = sa1100_timer_init,
.init_machine = assabet_init,
.init_late = sa11x0_init_late,
#ifdef CONFIG_SA1111
.dma_zone_size = SZ_1M,
#endif
.restart = sa11x0_restart,
MACHINE_END