// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/arch/arm/mach-sa1100/assabet.c
*
* Author: Nicolas Pitre
*
* This file contains all Assabet-specific tweaks.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/gpio-reg.h>
#include <linux/gpio/machine.h>
#include <linux/gpio_keys.h>
#include <linux/ioport.h>
#include <linux/platform_data/sa11x0-serial.h>
#include <linux/regulator/fixed.h>
#include <linux/regulator/machine.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/tlbflush.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.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 struct gpio_chip *assabet_bcr_gc;
static const char *assabet_names[] = {
"cf_pwr", "cf_gfx_reset", "nsoft_reset", "irda_fsel",
"irda_md0", "irda_md1", "stereo_loopback", "ncf_bus_on",
"audio_pwr_on", "light_pwr_on", "lcd16data", "lcd_pwr_on",
"rs232_on", "nred_led", "ngreen_led", "vib_on",
"com_dtr", "com_rts", "radio_wake_mod", "i2c_enab",
"tvir_enab", "qmute", "radio_pwr_on", "spkr_off",
"rs232_valid", "com_dcd", "com_cts", "com_dsr",
"radio_cts", "radio_dsr", "radio_dcd", "radio_ri",
};
/* The old deprecated interface */
void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
{
unsigned long m = mask, v = val;
assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v);
}
EXPORT_SYMBOL(ASSABET_BCR_frob);
static void __init assabet_init_gpio(void __iomem *reg, u32 def_val)
{
struct gpio_chip *gc;
writel_relaxed(def_val, reg);
gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val,
assabet_names, NULL, NULL);
if (IS_ERR(gc))
return;
assabet_bcr_gc = gc;
}
/*
* The codec reset goes to three devices, so we need to release
* the rest when any one of these requests it. However, that
* causes the ADV7171 to consume around 100mA - more than half
* the LCD-blanked power.
*
* With the ADV7171, LCD and backlight enabled, we go over
* budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
* is connected, the Assabet crashes.
*/
#define RST_UCB1X00 (1 << 0)
#define RST_UDA1341 (1 << 1)
#define RST_ADV7171 (1 << 2)
#define SDA GPIO_GPIO(15)
#define SCK GPIO_GPIO(18)
#define MOD GPIO_GPIO(17)
static void adv7171_start(void)
{
GPSR = SCK;
udelay(1);
GPSR = SDA;
udelay(2);
GPCR = SDA;
}
static void adv7171_stop(void)
{
GPSR = SCK;
udelay(2);
GPSR = SDA;
udelay(1);
}
static void adv7171_send(unsigned byte)
{
unsigned i;
for (i = 0; i < 8; i++, byte <<= 1) {
GPCR = SCK;
udelay(1);
if (byte & 0x80)
GPSR = SDA;
else
GPCR = SDA;
udelay(1);
GPSR = SCK;
udelay(1);
}
GPCR = SCK;
udelay(1);
GPSR = SDA;
udelay(1);
GPDR &= ~SDA;
GPSR = SCK;
udelay(1);
if (GPLR & SDA)
printk(KERN_WARNING "No ACK from ADV7171\n");
udelay(1);
GPCR = SCK | SDA;
udelay(1);
GPDR |= SDA;
udelay(1);
}
static void adv7171_write(unsigned reg, unsigned val)
{
unsigned gpdr = GPDR;
unsigned gplr = GPLR;
ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON);
udelay(100);
GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
GPDR = (GPDR | SCK | MOD) & ~SDA;
udelay(10);
if (!(GPLR & SDA))
printk(KERN_WARNING "Something dragging SDA down?\n");
GPDR |= SDA;
adv7171_start();
adv7171_send(0x54);
adv7171_send(reg);
adv7171_send(val);
adv7171_stop();
/* Restore GPIO state for L3 bus */
GPSR = gplr & (SDA | SCK | MOD);
GPCR = (~gplr) & (SDA | SCK | MOD);
GPDR = gpdr;
}
static void adv7171_sleep(void)
{
/* Put the ADV7171 into sleep mode */
adv7171_write(0x04, 0x40);
}
static unsigned codec_nreset;
static void assabet_codec_reset(unsigned mask, int set)
{
unsigned long flags;
bool old;
local_irq_save(flags);
old = !codec_nreset;
if (set)
codec_nreset &= ~mask;
else
codec_nreset |= mask;
if (old != !codec_nreset) {
if (codec_nreset) {
ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
adv7171_sleep();
} else {
ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
}
}
local_irq_restore(flags);
}
static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
{
int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND ||
state == UCB_RST_PROBE_FAIL;
assabet_codec_reset(RST_UCB1X00, set);
}
void assabet_uda1341_reset(int set)
{
assabet_codec_reset(RST_UDA1341, set);
}
EXPORT_SYMBOL(assabet_uda1341_reset);
/*
* 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),
};
static struct ucb1x00_plat_data assabet_ucb1x00_data = {
.reset = assabet_ucb1x00_reset,
.gpio_base = -1,
.can_wakeup = 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 struct gpiod_lookup_table assabet_cf_gpio_table = {
.dev_id = "sa11x0-pcmcia.1",
.table = {
GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW),
{ },
},
};
static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = {
REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"),
};
static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = {
.supply_name = "cf-power",
.microvolts = 3300000,
};
static struct gpiod_lookup_table assabet_cf_vcc_gpio_table = {
.dev_id = "reg-fixed-voltage.0",
.table = {
GPIO_LOOKUP("assabet", 0, NULL, GPIO_ACTIVE_HIGH),
{ },
},
};
static struct gpiod_lookup_table assabet_leds_gpio_table = {
.dev_id = "leds-gpio",
.table = {
GPIO_LOOKUP("assabet", 13, NULL, GPIO_ACTIVE_LOW),
GPIO_LOOKUP("assabet", 14, NULL, GPIO_ACTIVE_LOW),
{ },
},
};
static struct gpio_led assabet_leds[] __initdata = {
{
.name = "assabet:red",
.default_trigger = "cpu0",
.default_state = LEDS_GPIO_DEFSTATE_KEEP,
}, {
.name = "assabet:green",
.default_trigger = "heartbeat",
.default_state = LEDS_GPIO_DEFSTATE_KEEP,
},
};
static const struct gpio_led_platform_data assabet_leds_pdata __initconst = {
.num_leds = ARRAY_SIZE(assabet_leds),
.leds = assabet_leds,
};
static struct gpio_keys_button assabet_keys_buttons[] = {
{
.gpio = 0,
.irq = IRQ_GPIO0,
.desc = "gpio0",
.wakeup = 1,
.can_disable = 1,
.debounce_interval = 5,
}, {
.gpio = 1,
.irq = IRQ_GPIO1,
.desc = "gpio1",
.wakeup = 1,
.can_disable = 1,
.debounce_interval = 5,
},
};
static const struct gpio_keys_platform_data assabet_keys_pdata = {
.buttons = assabet_keys_buttons,
.nbuttons = ARRAY_SIZE(assabet_keys_buttons),
.rep = 0,
};
static struct gpiod_lookup_table assabet_uart1_gpio_table = {
.dev_id = "sa11x0-uart.1",
.table = {
GPIO_LOOKUP("assabet", 16, "dtr", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("assabet", 17, "rts", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("assabet", 25, "dcd", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("assabet", 26, "cts", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("assabet", 27, "dsr", GPIO_ACTIVE_LOW),
{ },
},
};
static struct gpiod_lookup_table assabet_uart3_gpio_table = {
.dev_id = "sa11x0-uart.3",
.table = {
GPIO_LOOKUP("assabet", 28, "cts", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("assabet", 29, "dsr", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("assabet", 30, "dcd", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("assabet", 31, "rng", GPIO_ACTIVE_LOW),
{ },
},
};
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()) {
#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
} else {
gpiod_add_lookup_table(&assabet_uart1_gpio_table);
gpiod_add_lookup_table(&assabet_uart3_gpio_table);
gpiod_add_lookup_table(&assabet_cf_vcc_gpio_table);
sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata,
assabet_cf_vcc_consumers,
ARRAY_SIZE(assabet_cf_vcc_consumers),
true);
}
platform_device_register_resndata(NULL, "gpio-keys", 0,
NULL, 0,
&assabet_keys_pdata,
sizeof(assabet_keys_pdata));
gpiod_add_lookup_table(&assabet_leds_gpio_table);
gpio_led_register_device(-1, &assabet_leds_pdata);
#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_mcp(&assabet_mcp_data);
if (!machine_has_neponset())
sa11x0_register_pcmcia(1, &assabet_cf_gpio_table);
}
/*
* 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_off_k(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 tag *tags, char **cmdline)
{
/* 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);
else
ASSABET_BCR_set(ASSABET_BCR_RS232EN);
}
}
static struct sa1100_port_fns assabet_port_fns __initdata = {
.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;
MSC1 = (MSC1 & ~0xffff) |
MSC_NonBrst | MSC_32BitStMem |
MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);
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);
}
static void __init assabet_init_irq(void)
{
u32 def_val;
sa1100_init_irq();
if (machine_has_neponset())
def_val = ASSABET_BCR_DB1111;
else
def_val = ASSABET_BCR_DB1110;
/*
* Angel sets this, but other bootloaders may not.
*
* This must precede any driver calls to BCR_set() or BCR_clear().
*/
assabet_init_gpio((void *)&ASSABET_BCR, def_val);
}
MACHINE_START(ASSABET, "Intel-Assabet")
.atag_offset = 0x100,
.fixup = fixup_assabet,
.map_io = assabet_map_io,
.nr_irqs = SA1100_NR_IRQS,
.init_irq = assabet_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
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