[ARM] Acer n30: Hardware initialisation.
Initialise the hardware register settings on boot, to allow the device to function correctly. Signed-off-by: Christer Weinigel <christer@weinigel.se> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Christer Weinigel
Ben Dooks
parent
e43f238390
commit
9a2ddb7866
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@ -345,9 +345,148 @@ static struct s3c2410_platform_i2c n30_i2ccfg = {
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.max_freq = 10*1000,
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};
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/* Lots of hardcoded stuff, but it sets up the hardware in a useful
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* state so that we can boot Linux directly from flash. */
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static void __init n30_hwinit(void)
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{
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/* GPA0-11 special functions -- unknown what they do
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* GPA12 N30 special function -- unknown what it does
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* N35/PiN output -- unknown what it does
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*
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* A12 is nGCS1 on the N30 and an output on the N35/PiN. I
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* don't think it does anything useful on the N30, so I ought
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* to make it an output there too since it always driven to 0
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* as far as I can tell. */
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if (machine_is_n30())
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__raw_writel(0x007fffff, S3C2410_GPACON);
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if (machine_is_n35())
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__raw_writel(0x007fefff, S3C2410_GPACON);
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__raw_writel(0x00000000, S3C2410_GPADAT);
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/* GPB0 TOUT0 backlight level
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* GPB1 output 1=backlight on
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* GPB2 output IrDA enable 0=transceiver enabled, 1=disabled
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* GPB3 output USB D+ pull up 0=disabled, 1=enabled
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* GPB4 N30 output -- unknown function
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* N30/PiN GPS control 0=GPS enabled, 1=GPS disabled
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* GPB5 output -- unknown function
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* GPB6 input -- unknown function
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* GPB7 output -- unknown function
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* GPB8 output -- probably LCD driver enable
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* GPB9 output -- probably LCD VSYNC driver enable
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* GPB10 output -- probably LCD HSYNC driver enable
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*/
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__raw_writel(0x00154556, S3C2410_GPBCON);
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__raw_writel(0x00000750, S3C2410_GPBDAT);
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__raw_writel(0x00000073, S3C2410_GPBUP);
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/* GPC0 input RS232 DCD/DSR/RI
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* GPC1 LCD
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* GPC2 output RS232 DTR?
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* GPC3 input RS232 DCD/DSR/RI
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* GPC4 LCD
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* GPC5 output 0=NAND write enabled, 1=NAND write protect
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* GPC6 input -- unknown function
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* GPC7 input charger status 0=charger connected
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* this input can be triggered by power on the USB device
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* port too, but will go back to disconnected soon after.
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* GPC8 N30/N35 output -- unknown function, always driven to 1
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* PiN input -- unknown function, always read as 1
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* Make it an input with a pull up for all models.
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* GPC9-15 LCD
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*/
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__raw_writel(0xaaa80618, S3C2410_GPCCON);
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__raw_writel(0x0000014c, S3C2410_GPCDAT);
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__raw_writel(0x0000fef2, S3C2410_GPCUP);
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/* GPD0 input -- unknown function
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* GPD1-D7 LCD
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* GPD8 N30 output -- unknown function
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* N35/PiN output 1=GPS LED on
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* GPD9 output 0=power led blinks red, 1=normal power led function
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* GPD10 output -- unknown function
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* GPD11-15 LCD drivers
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*/
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__raw_writel(0xaa95aaa4, S3C2410_GPDCON);
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__raw_writel(0x00000601, S3C2410_GPDDAT);
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__raw_writel(0x0000fbfe, S3C2410_GPDUP);
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/* GPE0-4 I2S audio bus
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* GPE5-10 SD/MMC bus
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* E11-13 outputs -- unknown function, probably power management
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* E14-15 I2C bus connected to the battery controller
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*/
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__raw_writel(0xa56aaaaa, S3C2410_GPECON);
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__raw_writel(0x0000efc5, S3C2410_GPEDAT);
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__raw_writel(0x0000f81f, S3C2410_GPEUP);
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/* GPF0 input 0=power button pressed
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* GPF1 input SD/MMC switch 0=card present
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* GPF2 N30 1=reset button pressed (inverted compared to the rest)
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* N35/PiN 0=reset button pressed
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* GPF3 N30/PiN input -- unknown function
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* N35 input GPS antenna position, 0=antenna closed, 1=open
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* GPF4 input 0=button 4 pressed
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* GPF5 input 0=button 3 pressed
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* GPF6 input 0=button 2 pressed
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* GPF7 input 0=button 1 pressed
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*/
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__raw_writel(0x0000aaaa, S3C2410_GPFCON);
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__raw_writel(0x00000000, S3C2410_GPFDAT);
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__raw_writel(0x000000ff, S3C2410_GPFUP);
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/* GPG0 input RS232 DCD/DSR/RI
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* GPG1 input 1=USB gadget port has power from a host
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* GPG2 N30 input -- unknown function
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* N35/PiN input 0=headphones plugged in, 1=not plugged in
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* GPG3 N30 output -- unknown function
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* N35/PiN input with unknown function
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* GPG4 N30 output 0=MMC enabled, 1=MMC disabled
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* GPG5 N30 output 0=BlueTooth chip disabled, 1=enabled
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* N35/PiN input joystick right
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* GPG6 N30 output 0=blue led on, 1=off
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* N35/PiN input joystick left
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* GPG7 input 0=thumbwheel pressed
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* GPG8 input 0=thumbwheel down
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* GPG9 input 0=thumbwheel up
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* GPG10 input SD/MMC write protect switch
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* GPG11 N30 input -- unknown function
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* N35 output 0=GPS antenna powered, 1=not powered
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* PiN output -- unknown function
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* GPG12-15 touch screen functions
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*
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* The pullups differ between the models, so enable all
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* pullups that are enabled on any of the models.
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*/
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if (machine_is_n30())
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__raw_writel(0xff0a956a, S3C2410_GPGCON);
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if (machine_is_n35())
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__raw_writel(0xff4aa92a, S3C2410_GPGCON);
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__raw_writel(0x0000e800, S3C2410_GPGDAT);
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__raw_writel(0x0000f86f, S3C2410_GPGUP);
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/* GPH0/1/2/3 RS232 serial port
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* GPH4/5 IrDA serial port
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* GPH6/7 N30 BlueTooth serial port
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* N35/PiN GPS receiver
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* GPH8 input -- unknown function
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* GPH9 CLKOUT0 HCLK -- unknown use
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* GPH10 CLKOUT1 FCLK -- unknown use
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*
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* The pull ups for H6/H7 are enabled on N30 but not on the
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* N35/PiN. I suppose is useful for a budget model of the N30
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* with no bluetooh. It doesn't hurt to have the pull ups
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* enabled on the N35, so leave them enabled for all models.
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*/
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__raw_writel(0x0028aaaa, S3C2410_GPHCON);
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__raw_writel(0x000005ef, S3C2410_GPHDAT);
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__raw_writel(0x0000063f, S3C2410_GPHUP);
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}
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static void __init n30_map_io(void)
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{
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s3c24xx_init_io(n30_iodesc, ARRAY_SIZE(n30_iodesc));
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n30_hwinit();
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s3c24xx_init_clocks(0);
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s3c24xx_init_uarts(n30_uartcfgs, ARRAY_SIZE(n30_uartcfgs));
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}
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