459 lines
11 KiB
C
459 lines
11 KiB
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/serial_core.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/partitions.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/mm.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/irq.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 <asm/mach/serial_sa1100.h>
|
|
#include <mach/assabet.h>
|
|
#include <mach/mcp.h>
|
|
|
|
#include "generic.h"
|
|
|
|
#define ASSABET_BCR_DB1110 \
|
|
(ASSABET_BCR_SPK_OFF | ASSABET_BCR_QMUTE | \
|
|
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_QMUTE | \
|
|
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_backlight_power(int on)
|
|
{
|
|
#ifndef ASSABET_PAL_VIDEO
|
|
if (on)
|
|
ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
|
|
else
|
|
#endif
|
|
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)
|
|
{
|
|
#ifndef ASSABET_PAL_VIDEO
|
|
if (on) {
|
|
ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
|
|
udelay(500);
|
|
} else
|
|
#endif
|
|
ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
|
|
}
|
|
|
|
|
|
/*
|
|
* 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[] = {
|
|
{
|
|
.start = SA1100_CS0_PHYS,
|
|
.end = SA1100_CS0_PHYS + SZ_32M - 1,
|
|
.flags = IORESOURCE_MEM,
|
|
}, {
|
|
.start = SA1100_CS1_PHYS,
|
|
.end = SA1100_CS1_PHYS + SZ_32M - 1,
|
|
.flags = IORESOURCE_MEM,
|
|
}
|
|
};
|
|
|
|
|
|
/*
|
|
* 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 mcp_plat_data assabet_mcp_data = {
|
|
.mccr0 = MCCR0_ADM,
|
|
.sclk_rate = 11981000,
|
|
};
|
|
|
|
static void __init assabet_init(void)
|
|
{
|
|
/*
|
|
* Ensure that the power supply is in "high power" mode.
|
|
*/
|
|
GPDR |= GPIO_GPIO16;
|
|
GPSR = 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
|
|
*/
|
|
GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
|
|
GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
sa1100fb_lcd_power = assabet_lcd_power;
|
|
sa1100fb_backlight_power = assabet_backlight_power;
|
|
|
|
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" );
|
|
#endif
|
|
}
|
|
|
|
sa11x0_set_flash_data(&assabet_flash_data, assabet_flash_resources,
|
|
ARRAY_SIZE(assabet_flash_resources));
|
|
sa11x0_set_irda_data(&assabet_irda_data);
|
|
sa11x0_set_mcp_data(&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 = io_p2v(phys);
|
|
int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
|
|
pmd_t *pmd;
|
|
|
|
pmd = pmd_offset(pgd_offset_k(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 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 machine_desc *desc, 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()) {
|
|
#ifdef CONFIG_ASSABET_NEPONSET
|
|
extern void neponset_map_io(void);
|
|
|
|
/*
|
|
* We map Neponset registers even if it isn't present since
|
|
* many drivers will try to probe their stuff (and fail).
|
|
* This is still more friendly than a kernel paging request
|
|
* crash.
|
|
*/
|
|
neponset_map_io();
|
|
#endif
|
|
} else {
|
|
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);
|
|
}
|
|
|
|
|
|
MACHINE_START(ASSABET, "Intel-Assabet")
|
|
.phys_io = 0x80000000,
|
|
.io_pg_offst = ((0xf8000000) >> 18) & 0xfffc,
|
|
.boot_params = 0xc0000100,
|
|
.fixup = fixup_assabet,
|
|
.map_io = assabet_map_io,
|
|
.init_irq = sa1100_init_irq,
|
|
.timer = &sa1100_timer,
|
|
.init_machine = assabet_init,
|
|
MACHINE_END
|