linux-stable/include/linux/i2c/dm355evm_msp.h
David Brownell 0931a4c6db mfd: dm355evm msp430 driver
Basic MFD framework for the MSP430 microcontroller firmware used
on the dm355evm board:

 - Provides an interface for other drivers: register read/write
   utilities, and register declarations.

 - Directly exports:
     * Many signals through the GPIO framework
         + LEDs
         + SW6 through gpio sysfs
	 + NTSC/nPAL jumper through gpio sysfs
	 + ... more could be added later, e.g. MMC signals
     * Child devices:
	+ LEDs, via leds-gpio child (and default triggers)
	+ RTC, via rtc-dm355evm child device
	+ Buttons and IR control, via dm355evm_keys

 - Supports power-off system call.  Use the reset button to power
   the board back up; the power supply LED will be on, but the
   MSP430 waits to re-activate the regulators.

 - On probe() this:
     * Announces firmware revision
     * Turns off the banked LEDs
     * Exports the resources noted above
     * Hooks the power-off support
     * Muxes tvp5146 -or- imager for video input

Unless the new tvp514x driver (tracked for mainline) is configured,
this assumes that some custom imager driver handles video-in.

This completely ignores the registers reporting the output voltages
on the various power supplies.  Someone could add a hwmon interface
if that seems useful.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
2009-01-04 12:17:43 +01:00

79 lines
2.8 KiB
C

/*
* dm355evm_msp.h - support MSP430 microcontroller on DM355EVM board
*/
#ifndef __LINUX_I2C_DM355EVM_MSP
#define __LINUX_I2C_DM355EVM_MSP
/*
* Written against Spectrum's writeup for the A4 firmware revision,
* and tweaked to match source and rev D2 schematics by removing CPLD
* and NOR flash hooks (which were last appropriate in rev B boards).
*
* Note that the firmware supports a flavor of write posting ... to be
* sure a write completes, issue another read or write.
*/
/* utilities to access "registers" emulated by msp430 firmware */
extern int dm355evm_msp_write(u8 value, u8 reg);
extern int dm355evm_msp_read(u8 reg);
/* command/control registers */
#define DM355EVM_MSP_COMMAND 0x00
# define MSP_COMMAND_NULL 0
# define MSP_COMMAND_RESET_COLD 1
# define MSP_COMMAND_RESET_WARM 2
# define MSP_COMMAND_RESET_WARM_I 3
# define MSP_COMMAND_POWEROFF 4
# define MSP_COMMAND_IR_REINIT 5
#define DM355EVM_MSP_STATUS 0x01
# define MSP_STATUS_BAD_OFFSET BIT(0)
# define MSP_STATUS_BAD_COMMAND BIT(1)
# define MSP_STATUS_POWER_ERROR BIT(2)
# define MSP_STATUS_RXBUF_OVERRUN BIT(3)
#define DM355EVM_MSP_RESET 0x02 /* 0 bits == in reset */
# define MSP_RESET_DC5 BIT(0)
# define MSP_RESET_TVP5154 BIT(2)
# define MSP_RESET_IMAGER BIT(3)
# define MSP_RESET_ETHERNET BIT(4)
# define MSP_RESET_SYS BIT(5)
# define MSP_RESET_AIC33 BIT(7)
/* GPIO registers ... bit patterns mostly match the source MSP ports */
#define DM355EVM_MSP_LED 0x03 /* active low (MSP P4) */
#define DM355EVM_MSP_SWITCH1 0x04 /* (MSP P5, masked) */
# define MSP_SWITCH1_SW6_1 BIT(0)
# define MSP_SWITCH1_SW6_2 BIT(1)
# define MSP_SWITCH1_SW6_3 BIT(2)
# define MSP_SWITCH1_SW6_4 BIT(3)
# define MSP_SWITCH1_J1 BIT(4) /* NTSC/PAL */
# define MSP_SWITCH1_MSP_INT BIT(5) /* active low */
#define DM355EVM_MSP_SWITCH2 0x05 /* (MSP P6, masked) */
# define MSP_SWITCH2_SW10 BIT(3)
# define MSP_SWITCH2_SW11 BIT(4)
# define MSP_SWITCH2_SW12 BIT(5)
# define MSP_SWITCH2_SW13 BIT(6)
# define MSP_SWITCH2_SW14 BIT(7)
#define DM355EVM_MSP_SDMMC 0x06 /* (MSP P2, masked) */
# define MSP_SDMMC_0_WP BIT(1)
# define MSP_SDMMC_0_CD BIT(2) /* active low */
# define MSP_SDMMC_1_WP BIT(3)
# define MSP_SDMMC_1_CD BIT(4) /* active low */
#define DM355EVM_MSP_FIRMREV 0x07 /* not a GPIO (out of order) */
#define DM355EVM_MSP_VIDEO_IN 0x08 /* (MSP P3, masked) */
# define MSP_VIDEO_IMAGER BIT(7) /* low == tvp5146 */
/* power supply registers are currently omitted */
/* RTC registers */
#define DM355EVM_MSP_RTC_0 0x12 /* LSB */
#define DM355EVM_MSP_RTC_1 0x13
#define DM355EVM_MSP_RTC_2 0x14
#define DM355EVM_MSP_RTC_3 0x15 /* MSB */
/* input event queue registers; code == ((HIGH << 8) | LOW) */
#define DM355EVM_MSP_INPUT_COUNT 0x16 /* decrement by reading LOW */
#define DM355EVM_MSP_INPUT_HIGH 0x17
#define DM355EVM_MSP_INPUT_LOW 0x18
#endif /* __LINUX_I2C_DM355EVM_MSP */