Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 548197bd authored by Hemant Pedanekar's avatar Hemant Pedanekar Committed by Kevin Hilman
Browse files

davinci: dm646x-evm: Add support for IDE 



Controls ATA_RSTn and ATA_PWD through CPLD register 0 to enable ATA. An I2C
driver is added for the same. Calls ide init if enabled in configuration.

Signed-off-by: default avatarHemant Pedanekar <hemantp@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent 10a1af38

arch/arm/mach-davinci/board-dm646x-evm.c

+59 −0
Original line number Diff line number Diff line
@@ -48,6 +48,17 @@ 
#include <mach/mmc.h>

#include <mach/emac.h>



#if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \

    defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)

#define HAS_ATA 1

#else

#define HAS_ATA 0

#endif



/* CPLD Register 0 bits to control ATA */

#define DM646X_EVM_ATA_RST		BIT(0)

#define DM646X_EVM_ATA_PWD		BIT(1)



#define DM646X_EVM_PHY_MASK		(0x2)

#define DM646X_EVM_MDIO_FREQUENCY	(2200000) /* PHY bus frequency */
@@ -55,6 +66,47 @@ static struct davinci_uart_config uart_config __initdata = { 
	.enabled_uarts = (1 << 0),

};



/* CPLD Register 0 Client: used for I/O Control */

static int cpld_reg0_probe(struct i2c_client *client,

			   const struct i2c_device_id *id)

{

	if (HAS_ATA) {

		u8 data;

		struct i2c_msg msg[2] = {

			{

				.addr = client->addr,

				.flags = I2C_M_RD,

				.len = 1,

				.buf = &data,

			},

			{

				.addr = client->addr,

				.flags = 0,

				.len = 1,

				.buf = &data,

			},

		};



		/* Clear ATA_RSTn and ATA_PWD bits to enable ATA operation. */

		i2c_transfer(client->adapter, msg, 1);

		data &= ~(DM646X_EVM_ATA_RST | DM646X_EVM_ATA_PWD);

		i2c_transfer(client->adapter, msg + 1, 1);

	}



	return 0;

}



static const struct i2c_device_id cpld_reg_ids[] = {

	{ "cpld_reg0", 0, },

	{ },

};



static struct i2c_driver dm6467evm_cpld_driver = {

	.driver.name	= "cpld_reg0",

	.id_table	= cpld_reg_ids,

	.probe		= cpld_reg0_probe,

};



/* LEDS */



static struct gpio_led evm_leds[] = {
@@ -246,6 +298,9 @@ static struct i2c_board_info __initdata i2c_info[] = { 
		I2C_BOARD_INFO("pcf8574a", 0x38),

		.platform_data	= &pcf_data,

	},

	{

		I2C_BOARD_INFO("cpld_reg0", 0x3a),

	},

};



static struct davinci_i2c_platform_data i2c_pdata = {
@@ -256,6 +311,7 @@ static struct davinci_i2c_platform_data i2c_pdata = { 
static void __init evm_init_i2c(void)

{

	davinci_init_i2c(&i2c_pdata);

	i2c_add_driver(&dm6467evm_cpld_driver);

	i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));

}
@@ -273,6 +329,9 @@ static __init void evm_init(void) 
	dm646x_init_mcasp0(&dm646x_evm_snd_data[0]);

	dm646x_init_mcasp1(&dm646x_evm_snd_data[1]);



	if (HAS_ATA)

		dm646x_init_ide();



	soc_info->emac_pdata->phy_mask = DM646X_EVM_PHY_MASK;

	soc_info->emac_pdata->mdio_max_freq = DM646X_EVM_MDIO_FREQUENCY;

}