[U-Boot] [PATCH v2] OMAP3: add CM-T35 board

[Ben Warren <biggerbadderben@gmail.com>]

Mike Rapoport wrote:
> Add CM-T35 board support
>
> --
> v2 changes:
> - rename board config file from omap3_cm-t35.h to cm-t35.h
> - remove SZ_xx references
> - add MAKEALL/MAINTEINERS entries
> --
>
>   
<snip>
> --- /dev/null
> +++ b/board/cm-t35/cm-t35.c
> @@ -0,0 +1,196 @@
> +/*
> + * (C) Copyright 2009
> + * CompuLab, Ltd. <www.compulab.co.il>
> + *
> + * Authors :
> + *	Igor Vaisbein <igor@compulab.co.il>
> + *	Mike Rapoport <mike@compulab.co.il>
> + *
> + * Derived from omap3evm and Beagle Board by
> + *	Manikandan Pillai <mani.pillai@ti.com>
> + *	Richard Woodruff <r-woodruff2@ti.com>
> + *	Syed Mohammed Khasim <x0khasim@ti.com>
> + *
> + * See file CREDITS for list of people who contributed to this
> + * project.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
> + * MA 02111-1307 USA
> + */
> +
> +#include <common.h>
> +#include <netdev.h>
> +#include <net.h>
> +#include <i2c.h>
> +#include <twl4030.h>
> +
> +#include <asm/io.h>
> +#include <asm/arch/mem.h>
> +#include <asm/arch/mux.h>
> +#include <asm/arch/sys_proto.h>
> +#include <asm/mach-types.h>
> +
> +#include "cm-t35.h"
> +
> +#define CM_T35_SMC911X_BASE	0x2C000000
> +#define SB_T35_SMC911X_BASE	(CM_T35_SMC911X_BASE + (16 << 20))
>   
Please follow convention and put this stuff in include/configs/board.h
> +
> +static u32 gpmc_net_config[GPMC_MAX_REG] = {
> +	NET_GPMC_CONFIG1,
> +	NET_GPMC_CONFIG2,
> +	NET_GPMC_CONFIG3,
> +	NET_GPMC_CONFIG4,
> +	NET_GPMC_CONFIG5,
> +	NET_GPMC_CONFIG6,
> +	0
> +};
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +/*
> + * Routine: setup_net_chip
> + * Description: Setting up the configuration GPMC registers specific to the
> + *		Ethernet hardware.
> + */
> +static void setup_net_chip(void)
> +{
> +	struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;
> +
> +	enable_gpmc_cs_config(gpmc_net_config, &gpmc_cfg->cs[5],
> +			      CM_T35_SMC911X_BASE, GPMC_SIZE_16M);
> +	enable_gpmc_cs_config(gpmc_net_config, &gpmc_cfg->cs[4],
> +			      SB_T35_SMC911X_BASE, GPMC_SIZE_16M);
> +
> +	/* Enable off mode for NWE in PADCONF_GPMC_NWE register */
> +	writew(readw(&ctrl_base->gpmc_nwe) | 0x0E00, &ctrl_base->gpmc_nwe);
> +
> +	/* Enable off mode for NOE in PADCONF_GPMC_NADV_ALE register */
> +	writew(readw(&ctrl_base->gpmc_noe) | 0x0E00, &ctrl_base->gpmc_noe);
> +
> +	/* Enable off mode for ALE in PADCONF_GPMC_NADV_ALE register */
> +	writew(readw(&ctrl_base->gpmc_nadv_ale) | 0x0E00,
> +		&ctrl_base->gpmc_nadv_ale);
> +
> +	/* Reset the ethernet controller via TPS65930 GPIO */
> +	/* Set GPIO1 of TPS65930 as output */
> +	twl4030_i2c_write_u8(TWL4030_CHIP_GPIO, 0x02,
> +			     TWL4030_BASEADD_GPIO+0x03);
> +	/* Send a pulse on the GPIO pin */
> +	twl4030_i2c_write_u8(TWL4030_CHIP_GPIO, 0x02,
> +			     TWL4030_BASEADD_GPIO+0x0C);
> +	udelay(1);
> +	twl4030_i2c_write_u8(TWL4030_CHIP_GPIO, 0x02,
> +			     TWL4030_BASEADD_GPIO+0x09);
> +	udelay(1);
> +	twl4030_i2c_write_u8(TWL4030_CHIP_GPIO, 0x02,
> +			     TWL4030_BASEADD_GPIO+0x0C);
> +
> +}
> +
> +/*
> + * Routine: board_init
> + * Description: Early hardware init.
> + */
> +int board_init(void)
> +{
> +	gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
> +
> +	/* board id for Linux */
> +	gd->bd->bi_arch_number = MACH_TYPE_CM_T35;
> +	/* boot param addr */
> +	gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
> +
> +	return 0;
> +}
> +
> +/*
> + * Routine: misc_init_r
> + * Description: Init ethernet (done here so udelay works)
> + */
> +int misc_init_r(void)
> +{
> +
> +#ifdef CONFIG_DRIVER_OMAP34XX_I2C
> +	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
> +#endif
> +
> +#if defined(CONFIG_CMD_NET)
> +	setup_net_chip();
> +#endif
> +
> +	dieid_num_r();
> +
> +	return 0;
> +}
> +
> +/*
> + * Routine: set_muxconf_regs
> + * Description: Setting up the configuration Mux registers specific to the
> + *		hardware. Many pins need to be moved from protect to primary
> + *		mode.
> + */
> +void set_muxconf_regs(void)
> +{
> +	MUX_CM_T35();
> +}
> +
> +/*
> + * Routine: handle_mac_address
> + * Description: prepare MAC address for on-board Ethernet.
> + */
> +static int handle_mac_address(void)
> +{
> +	unsigned char enetaddr[6];
> +	int rc;
> +
> +	rc = eth_getenv_enetaddr("ethaddr", enetaddr);
> +	if (rc)
> +		return 0;
> +
> +	rc = i2c_read(0x50, 0, 1, enetaddr, 6);
> +	if (rc)
> +		return rc;
> +
> +	if (!is_valid_ether_addr(enetaddr))
> +		return -1;
> +
> +	return eth_setenv_enetaddr("ethaddr", enetaddr);
> +}
>   
the value in environment must be able to override the value in NV-RAM.  
This seems to do the opposite.  If you're implementing NV-RAM in a 
different way that is common for the driver in question, I'd prefer to 
see you implement some kind of callback mechanism in the driver.  This 
will ensure proper flow.
> +
> +/*
> + * Routine: board_eth_init
> + * Description: initialize module and base-board Ethernet chips
> + */
> +int board_eth_init(bd_t *bis)
> +{
> +	int err1 = 0, err2 = 0;
> +
> +#ifdef CONFIG_SMC911X
> +	err1 = handle_mac_address();
> +	err2 = smc911x_initialize(0, CM_T35_SMC911X_BASE);
> +
> +	if (err1 && !err2)
> +		printf("CM-T35: No MAC address found\n");
> +
> +	err1 = smc911x_initialize(1, SB_T35_SMC911X_BASE);
> +
> +	/* run eth_init to set up MAC address prior to OS boot */
> +	if (!err1 || !err2)
> +		err1 = eth_init(bis);
>   
We don't touch hardware that isn't used by U-boot.  You'll find all 
sorts of threads in the archive about this.
> +	else
> +		err1 = -1;
> +#endif
> +	return err1;
>   
As I believe others have mentioned, return the number of interfaces 
initialized (will be 0 or 1).

<snip>
> +/* BOOTP fields */
> +#define CONFIG_BOOTP_SUBNETMASK		0x00000001
> +#define CONFIG_BOOTP_GATEWAY		0x00000002
> +#define CONFIG_BOOTP_HOSTNAME		0x00000004
> +#define CONFIG_BOOTP_BOOTPATH		0x00000010
> +
>   
Please don't set any default network parameters.

regards,
Ben