xburst-tools/qiboot/src/gta03/gta03.c

#include <qi.h>
#include <neo_gta03.h>
#include <serial-s3c24xx.h>
#include <ports-s3c24xx.h>
#include <i2c-bitbang-s3c24xx.h>

#define GTA03_DEBUG_UART 2

#define PCF50633_I2C_ADS 0x73


static const struct board_variant board_variants[] = {
	[0] = {
		.name = "EVB PCB",
		.machine_revision = 0x010,
	},
};

void port_init_gta03(void)
{
	unsigned int * MPLLCON = (unsigned int *)0x4c000004;
	unsigned int * UPLLCON = (unsigned int *)0x4c000008;
	unsigned int * CLKDIVN = (unsigned int *)0x4c000014;

	//CAUTION:Follow the configuration order for setting the ports.
	// 1) setting value(GPnDAT)
	// 2) setting control register  (GPnCON)
	// 3) configure pull-up resistor(GPnUP)

	/* 32bit data bus configuration   */
	/*
	 * === PORT A GROUP
	 *     Ports  : GPA22 GPA21  GPA20 GPA19 GPA18 GPA17 GPA16 GPA15 GPA14 GPA13 GPA12
	 *     Signal : nFCE nRSTOUT nFRE   nFWE  ALE   CLE  nGCS5 nGCS4 nGCS3 nGCS2 nGCS1
	 *     Binary :  1     1      1  , 1   1   1    1   ,  1     1     1     1
	 *     Ports  : GPA11   GPA10  GPA9   GPA8   GPA7   GPA6   GPA5   GPA4   GPA3   GPA2   GPA1  GPA0
	 *     Signal : ADDR26 ADDR25 ADDR24 ADDR23 ADDR22 ADDR21 ADDR20 ADDR19 ADDR18 ADDR17 ADDR16 ADDR0
	 *     Binary :  1       1      1      1   , 1       1      1      1   ,  1       1     1      1
	 */
	rGPACON = 0x007F8FFF;
	/*
	 * ===* PORT B GROUP
	 *      Ports  : GPB10    GPB9    GPB8    GPB7    GPB6     GPB5    GPB4   GPB3   GPB2     GPB1      GPB0
	 *      Signal : nXDREQ0 nXDACK0 nXDREQ1 nXDACK1 nSS_KBD nDIS_OFF L3CLOCK L3DATA L3MODE nIrDATXDEN Keyboard
	 *      Setting: INPUT  OUTPUT   INPUT  OUTPUT   INPUT   OUTPUT   OUTPUT OUTPUT OUTPUT   OUTPUT    OUTPUT
	 *      Binary :   00  ,  01       00  ,   01      00   ,  01       01  ,   01     01   ,  01        01
	 */
	rGPBCON = 0x00145554;
	rGPBDAT |= (1 <<9 );	/* USB_PULLUP */
	rGPBUP = 0x000007FF;
	/*
	 * === PORT C GROUP
	 *     Ports  : GPC15 GPC14 GPC13 GPC12 GPC11 GPC10 GPC9 GPC8  GPC7   GPC6   GPC5 GPC4 GPC3  GPC2  GPC1 GPC0
	 *     Signal : VD7   VD6   VD5   VD4   VD3   VD2   VD1  VD0 LCDVF2 LCDVF1 LCDVF0 VM VFRAME VLINE VCLK LEND
	 *     Binary :  10   10  , 10    10  , 10    10  , 10   10  , 10     10  ,  10   10 , 10     10 , 10   10
	 */
	rGPCCON = 0xAAA776E9;
	rGPCUP = 0x0000FFFF;
	rGPCDAT |= (1 << 9); /* WLAN_nRESET pull high */
	/*
	 * === PORT D GROUP
	 *     Ports  : GPD15 GPD14 GPD13 GPD12 GPD11 GPD10 GPD9 GPD8 GPD7 GPD6 GPD5 GPD4 GPD3 GPD2 GPD1 GPD0
	 *     Signal : VD23  VD22  VD21  VD20  VD19  VD18  VD17 VD16 VD15 VD14 VD13 VD12 VD11 VD10 VD9  VD8
	 *     Binary : 10    10  , 10    10  , 10    10  , 10   10 , 10   10 , 10   10 , 10   10 ,10   10
	 */
	rGPDCON = 0xAAA0AAA5;
	rGPDUP = 0x0000FFFF;
	/*
	 * === PORT E GROUP
	 *     Ports  : GPE15  GPE14 GPE13   GPE12   GPE11   GPE10   GPE9    GPE8     GPE7  GPE6  GPE5   GPE4
	 *     Signal : IICSDA IICSCL SPICLK SPIMOSI SPIMISO SDDATA3 SDDATA2 SDDATA1 SDDATA0 SDCMD SDCLK I2SSDO
	 *     Binary :  10     10  ,  10      10  ,  10      10   ,  10      10   ,   10    10  , 10     10  ,
	 *     -------------------------------------------------------------------------------------------------------
	 *     Ports  :  GPE3   GPE2  GPE1    GPE0
	 *     Signal : I2SSDI CDCLK I2SSCLK I2SLRCK
	 *     Binary :  10     10  ,  10      10
	 */
	rGPECON = 0xAAAAAAAA;
	rGPEUP = 0x0000FFFF;
	/*
	 * === PORT F GROUP
	 *     Ports  : GPF7   GPF6   GPF5   GPF4      GPF3     GPF2  GPF1   GPF0
	 *     Signal : nLED_8 nLED_4 nLED_2 nLED_1 nIRQ_PCMCIA EINT2 KBDINT EINT0
	 *     Setting: Output Output Output Output    EINT3    EINT2 EINT1  EINT0
	 *     Binary :  01      01 ,  01     01  ,     10       10  , 10     10
	 */
	rGPFCON = 0x0000AAAA;
	rGPFUP = 0x000000FF;

	/*
	 * === PORT G GROUP
	 *     Ports  : GPG15 GPG14 GPG13 GPG12 GPG11    GPG10    GPG9     GPG8     GPG7      GPG6
	 *     Signal : nYPON  YMON nXPON XMON  EINT19 DMAMODE1 DMAMODE0 DMASTART KBDSPICLK KBDSPIMOSI
	 *     Setting: nYPON  YMON nXPON XMON  EINT19  Output   Output   Output   SPICLK1    SPIMOSI1
	 *     Binary :   11    11 , 11    11  , 10      01    ,   01       01   ,    11         11
	 *     -----------------------------------------------------------------------------------------
	 *     Ports  :    GPG5       GPG4    GPG3    GPG2    GPG1    GPG0
	 *     Signal : KBDSPIMISO LCD_PWREN EINT11 nSS_SPI IRQ_LAN IRQ_PCMCIA
	 *     Setting:  SPIMISO1  LCD_PWRDN EINT11   nSS0   EINT9    EINT8
	 *     Binary :     11         11   ,  10      11  ,  10        10
	 */
	rGPGCON = 0x02A9FE5A;
	rGPGUP = 0x0000FFFF;

	/*
	 * === PORT H GROUP
	 *     Ports  :  GPH10    GPH9  GPH8 GPH7  GPH6  GPH5 GPH4 GPH3 GPH2 GPH1  GPH0
	 *     Signal : CLKOUT1 CLKOUT0 UCLK RXD2 TXD2 RXD1 TXD1 RXD0 TXD0 nRTS0 nCTS0
	 *     Binary :   10   ,  10     10 , 11    11  , 10   10 , 10   10 , 10    10
	 */
	/* pulldown on GPH08: UEXTCLK, just floats!
	 * pulldown GPH0 -- nCTS0 / RTS_MODEM -- floats when GSM off
	 * pulldown GPH3 -- RXD[0] / TX_MODEM -- floats when GSM off
	 */
	rGPHCON = 0x0019A0AA;
	rGPHUP = 0x000007FF;

	/* pulldown on GPJ00: input, just floats! */
	/* pulldown on GPJ07: WLAN module WLAN_GPIO0, no ext pull */
	rGPJCON = 0x02AAAAAA;
	rGPJUP = 0x1FFFF;

	/*
	 * We have to talk to the PMU a little bit
	 */

	/* We need SD Card rail (HCLDO) at 3.0V */
	i2c_write_sync(&bb_s3c24xx, PCF50633_I2C_ADS, 0x39, 21);

	/* switch HCLDO on */
	i2c_write_sync(&bb_s3c24xx, PCF50633_I2C_ADS, 0x3a, 1);

	/* push DOWN1 (CPU Core rail) to 1.7V, allowing 533MHz */
	i2c_write_sync(&bb_s3c24xx, PCF50633_I2C_ADS, 0x1e, 0x2b);

	/* change CPU clocking to 533MHz 1:4:8 */

	/* clock divide 1:4:8 - do it first */
	*CLKDIVN = 5;
	/* configure UPLL */
	*UPLLCON = ((88 << 12) + (4 << 4) + 2);
	/* Magic delay: Page 7-19, seven nops between UPLL and MPLL */
	asm __volatile__ (
		"nop\n"\
		"nop\n"\
		"nop\n"\
		"nop\n"\
		"nop\n"\
		"nop\n"\
		"nop\n"\
	);
	/* configure MPLL */
	*MPLLCON = ((169 << 12) + (2 << 4) + 1);


	serial_init_115200_s3c24xx(GTA03_DEBUG_UART, 50 /*MHz PCLK */);
}

/**
 * returns PCB revision information in b0, d8, d9
 * GTA03 EVB returns 0x000
 * GTA03 returns 0x001
 */

int gta03_get_pcb_revision(void)
{
	int n;
	u32 u;

	/* make B0 inputs */
	rGPBCON &= ~0x00000003;
	/* D8 and D9 inputs */
	rGPDCON &= ~0x000f0000;

	/* delay after changing pulldowns */
	u = rGPBDAT;
	u = rGPDDAT;

	/* read the version info */
	u = rGPBDAT;
	n = (u >> (0 - 0))& 0x001;
	u = rGPDDAT;
	n |= (u >> (8 -1))  & 0x002;
	n |= (u >> (9 - 2))  & 0x004;

	/*
	 * when not being interrogated, all of the revision GPIO
	 * are set to output
	 */
	/* make B0 high ouput */
	rGPBCON |= 0x00000001;
	/* D8 and D9 high ouputs */
	rGPDCON |= 0x00050000;

	return n;

}

const struct board_variant const * get_board_variant_gta03(void)
{
	return &board_variants[gta03_get_pcb_revision()];
}

int is_this_board_gta03(void)
{
	/* FIXME: find something gta03 specific */
	return 1;
}

static void putc_gta03(char c)
{
	serial_putc_s3c24xx(GTA03_DEBUG_UART, c);
}


/*
 * our API for bootloader on this machine
 */
const struct board_api board_api_gta03 = {
	.name = "GTA03",
	.linux_machine_id = 1808,
	.linux_mem_start = 0x30000000,
	.linux_mem_size = (128 * 1024 * 1024),
	.linux_tag_placement = 0x30000000 + 0x100,
	.get_board_variant = get_board_variant_gta03,
	.is_this_board = is_this_board_gta03,
	.port_init = port_init_gta03,
	.putc = putc_gta03,
	/* these are the ways we could boot GTA03 in order to try */
	.kernel_source = {
		[0] = {
			.name = "NAND Kernel",
			.block_read = nand_read_ll,
			.partition_index = -1,
			.offset_if_no_partition = 0x80000,
			.filesystem = FS_RAW,
			.commandline = 	"neo1973-nand:" \
					 "0x00040000(qi)," \
					 "0x00040000(cmdline)," \
					 "0x00800000(backupkernel)," \
					 "0x000a0000(extra)," \
					 "0x00040000(identity)," \
					 "0x0f6a0000(backuprootfs) " \
				       "rootfstype=jffs2 " \
				       "root=/dev/mtdblock6 " \
				       "console=ttySAC2,115200 " \
				       "loglevel=4 " \
				       "init=/sbin/init "\
				       "ro"
		},
	},
};