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author | Hemant Pedanekar <hemantp@ti.com> | 2009-07-17 23:30:36 +0530 |
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committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-08-26 11:55:47 +0300 |
commit | 548197bdf02882db39b7563d26975e7549e6af03 (patch) | |
tree | 91eb24de0050eadc8ababbbb0124eb7b9cbeba3e /arch/arm/mach-davinci | |
parent | 10a1af384e8157fa2e3275d68346cceff1ad06ca (diff) | |
download | op-kernel-dev-548197bdf02882db39b7563d26975e7549e6af03.zip op-kernel-dev-548197bdf02882db39b7563d26975e7549e6af03.tar.gz |
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: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci')
-rw-r--r-- | arch/arm/mach-davinci/board-dm646x-evm.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c index 0aa18df..fa91520 100644 --- a/arch/arm/mach-davinci/board-dm646x-evm.c +++ b/arch/arm/mach-davinci/board-dm646x-evm.c @@ -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; } |