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linux_dsm_epyc7002/arch/arm/mach-s3c64xx/mach-mini6410.c
Darius Augulis 8b8c87dee4 ARM: S3C64XX: fix uart clock setup for mini6410/real6410 
Don't rewrite clock config in UCON preconfigured by
bootloader. No need to set 10th bit in UCON because
[11:10] 2'b00 means source clock is PCLK too.
If set, console does not work if bootloader
has preconfigured [11:10] with 2'b00.
If not set, console works with any bootloader
config value (2'bxx).
More information about clock setup in UCON is available
in "S3C6410X RISC Microprocessor User's Manual,
Revision 1.20" p. 31-13 (Chapter 31.6.2
UART CONTROL REGISTER).

Signed-off-by: Darius Augulis <augulis.darius@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-11-25 10:58:11 +09:00

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/* linux/arch/arm/mach-s3c64xx/mach-mini6410.c
*
* Copyright 2010 Darius Augulis <augulis.darius@gmail.com>
* Copyright 2008 Openmoko, Inc.
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* 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/interrupt.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/dm9000.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/serial_core.h>
#include <linux/types.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <mach/map.h>
#include <mach/regs-fb.h>
#include <mach/regs-gpio.h>
#include <mach/regs-modem.h>
#include <mach/regs-srom.h>
#include <mach/s3c6410.h>
#include <plat/adc.h>
#include <plat/cpu.h>
#include <plat/devs.h>
#include <plat/fb.h>
#include <plat/nand.h>
#include <plat/regs-serial.h>
#include <plat/ts.h>
#include <video/platform_lcd.h>
#define UCON S3C2410_UCON_DEFAULT
#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
static struct s3c2410_uartcfg mini6410_uartcfgs[] __initdata = {
[0] = {
.hwport = 0,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
[1] = {
.hwport = 1,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
[2] = {
.hwport = 2,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
[3] = {
.hwport = 3,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
};
/* DM9000AEP 10/100 ethernet controller */
static struct resource mini6410_dm9k_resource[] = {
[0] = {
.start = S3C64XX_PA_XM0CSN1,
.end = S3C64XX_PA_XM0CSN1 + 1,
.flags = IORESOURCE_MEM
},
[1] = {
.start = S3C64XX_PA_XM0CSN1 + 4,
.end = S3C64XX_PA_XM0CSN1 + 5,
.flags = IORESOURCE_MEM
},
[2] = {
.start = S3C_EINT(7),
.end = S3C_EINT(7),
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHLEVEL
}
};
static struct dm9000_plat_data mini6410_dm9k_pdata = {
.flags = (DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM),
};
static struct platform_device mini6410_device_eth = {
.name = "dm9000",
.id = -1,
.num_resources = ARRAY_SIZE(mini6410_dm9k_resource),
.resource = mini6410_dm9k_resource,
.dev = {
.platform_data = &mini6410_dm9k_pdata,
},
};
static struct mtd_partition mini6410_nand_part[] = {
[0] = {
.name = "uboot",
.size = SZ_1M,
.offset = 0,
},
[1] = {
.name = "kernel",
.size = SZ_2M,
.offset = SZ_1M,
},
[2] = {
.name = "rootfs",
.size = MTDPART_SIZ_FULL,
.offset = SZ_1M + SZ_2M,
},
};
static struct s3c2410_nand_set mini6410_nand_sets[] = {
[0] = {
.name = "nand",
.nr_chips = 1,
.nr_partitions = ARRAY_SIZE(mini6410_nand_part),
.partitions = mini6410_nand_part,
},
};
static struct s3c2410_platform_nand mini6410_nand_info = {
.tacls = 25,
.twrph0 = 55,
.twrph1 = 40,
.nr_sets = ARRAY_SIZE(mini6410_nand_sets),
.sets = mini6410_nand_sets,
};
static struct s3c_fb_pd_win mini6410_fb_win[] = {
{
.win_mode = { /* 4.3" 480x272 */
.left_margin = 3,
.right_margin = 2,
.upper_margin = 1,
.lower_margin = 1,
.hsync_len = 40,
.vsync_len = 1,
.xres = 480,
.yres = 272,
},
.max_bpp = 32,
.default_bpp = 16,
}, {
.win_mode = { /* 7.0" 800x480 */
.left_margin = 8,
.right_margin = 13,
.upper_margin = 7,
.lower_margin = 5,
.hsync_len = 3,
.vsync_len = 1,
.xres = 800,
.yres = 480,
},
.max_bpp = 32,
.default_bpp = 16,
},
};
static struct s3c_fb_platdata mini6410_lcd_pdata __initdata = {
.setup_gpio = s3c64xx_fb_gpio_setup_24bpp,
.win[0] = &mini6410_fb_win[0],
.vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
.vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
};
static void mini6410_lcd_power_set(struct plat_lcd_data *pd,
unsigned int power)
{
if (power)
gpio_direction_output(S3C64XX_GPE(0), 1);
else
gpio_direction_output(S3C64XX_GPE(0), 0);
}
static struct plat_lcd_data mini6410_lcd_power_data = {
.set_power = mini6410_lcd_power_set,
};
static struct platform_device mini6410_lcd_powerdev = {
.name = "platform-lcd",
.dev.parent = &s3c_device_fb.dev,
.dev.platform_data = &mini6410_lcd_power_data,
};
static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
.delay = 10000,
.presc = 49,
.oversampling_shift = 2,
};
static struct platform_device *mini6410_devices[] __initdata = {
&mini6410_device_eth,
&s3c_device_hsmmc0,
&s3c_device_hsmmc1,
&s3c_device_ohci,
&s3c_device_nand,
&s3c_device_fb,
&mini6410_lcd_powerdev,
&s3c_device_adc,
&s3c_device_ts,
};
static void __init mini6410_map_io(void)
{
u32 tmp;
s3c64xx_init_io(NULL, 0);
s3c24xx_init_clocks(12000000);
s3c24xx_init_uarts(mini6410_uartcfgs, ARRAY_SIZE(mini6410_uartcfgs));
/* set the LCD type */
tmp = __raw_readl(S3C64XX_SPCON);
tmp &= ~S3C64XX_SPCON_LCD_SEL_MASK;
tmp |= S3C64XX_SPCON_LCD_SEL_RGB;
__raw_writel(tmp, S3C64XX_SPCON);
/* remove the LCD bypass */
tmp = __raw_readl(S3C64XX_MODEM_MIFPCON);
tmp &= ~MIFPCON_LCD_BYPASS;
__raw_writel(tmp, S3C64XX_MODEM_MIFPCON);
}
/*
* mini6410_features string
*
* 0-9 LCD configuration
*
*/
static char mini6410_features_str[12] __initdata = "0";
static int __init mini6410_features_setup(char *str)
{
if (str)
strlcpy(mini6410_features_str, str,
sizeof(mini6410_features_str));
return 1;
}
__setup("mini6410=", mini6410_features_setup);
#define FEATURE_SCREEN (1 << 0)
struct mini6410_features_t {
int done;
int lcd_index;
};
static void mini6410_parse_features(
struct mini6410_features_t *features,
const char *features_str)
{
const char *fp = features_str;
features->done = 0;
features->lcd_index = 0;
while (*fp) {
char f = *fp++;
switch (f) {
case '0'...'9': /* tft screen */
if (features->done & FEATURE_SCREEN) {
printk(KERN_INFO "MINI6410: '%c' ignored, "
"screen type already set\n", f);
} else {
int li = f - '0';
if (li >= ARRAY_SIZE(mini6410_fb_win))
printk(KERN_INFO "MINI6410: '%c' out "
"of range LCD mode\n", f);
else {
features->lcd_index = li;
}
}
features->done |= FEATURE_SCREEN;
break;
}
}
}
static void __init mini6410_machine_init(void)
{
u32 cs1;
struct mini6410_features_t features = { 0 };
printk(KERN_INFO "MINI6410: Option string mini6410=%s\n",
mini6410_features_str);
/* Parse the feature string */
mini6410_parse_features(&features, mini6410_features_str);
mini6410_lcd_pdata.win[0] = &mini6410_fb_win[features.lcd_index];
printk(KERN_INFO "MINI6410: selected LCD display is %dx%d\n",
mini6410_lcd_pdata.win[0]->win_mode.xres,
mini6410_lcd_pdata.win[0]->win_mode.yres);
s3c_nand_set_platdata(&mini6410_nand_info);
s3c_fb_set_platdata(&mini6410_lcd_pdata);
s3c24xx_ts_set_platdata(&s3c_ts_platform);
/* configure nCS1 width to 16 bits */
cs1 = __raw_readl(S3C64XX_SROM_BW) &
~(S3C64XX_SROM_BW__CS_MASK << S3C64XX_SROM_BW__NCS1__SHIFT);
cs1 |= ((1 << S3C64XX_SROM_BW__DATAWIDTH__SHIFT) |
(1 << S3C64XX_SROM_BW__WAITENABLE__SHIFT) |
(1 << S3C64XX_SROM_BW__BYTEENABLE__SHIFT)) <<
S3C64XX_SROM_BW__NCS1__SHIFT;
__raw_writel(cs1, S3C64XX_SROM_BW);
/* set timing for nCS1 suitable for ethernet chip */
__raw_writel((0 << S3C64XX_SROM_BCX__PMC__SHIFT) |
(6 << S3C64XX_SROM_BCX__TACP__SHIFT) |
(4 << S3C64XX_SROM_BCX__TCAH__SHIFT) |
(1 << S3C64XX_SROM_BCX__TCOH__SHIFT) |
(13 << S3C64XX_SROM_BCX__TACC__SHIFT) |
(4 << S3C64XX_SROM_BCX__TCOS__SHIFT) |
(0 << S3C64XX_SROM_BCX__TACS__SHIFT), S3C64XX_SROM_BC1);
gpio_request(S3C64XX_GPF(15), "LCD power");
gpio_request(S3C64XX_GPE(0), "LCD power");
platform_add_devices(mini6410_devices, ARRAY_SIZE(mini6410_devices));
}
MACHINE_START(MINI6410, "MINI6410")
/* Maintainer: Darius Augulis <augulis.darius@gmail.com> */
.boot_params = S3C64XX_PA_SDRAM + 0x100,
.init_irq = s3c6410_init_irq,
.map_io = mini6410_map_io,
.init_machine = mini6410_machine_init,
.timer = &s3c24xx_timer,
MACHINE_END
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