Hello?
Thanks for comments.
Some patches will be posted for your requests.
Also I wrote my opinion for some comments.
>> diff --git a/drivers/block/Makefile b/drivers/block/Makefile
>> index 59388d9..eccefc1 100644
>> --- a/drivers/block/Makefile
>> +++ b/drivers/block/Makefile
>> @@ -25,13 +25,14 @@ include $(TOPDIR)/config.mk
>>
>> LIB := $(obj)libblock.a
>>
>> -COBJS-$(CONFIG_SCSI_AHCI) += ahci.o
> why?
This list badly sorted before I add. I just resort it to
alphabetical order and add new option. Nothing removed.
>> COBJS-$(CONFIG_ATA_PIIX) += ata_piix.o
>> +COBJS-$(CONFIG_CMD_MG_DISK) += mg_disk.o
>> COBJS-$(CONFIG_FSL_SATA) += fsl_sata.o
>> +COBJS-$(CONFIG_IDE_SIL680) += sil680.o
>> COBJS-$(CONFIG_LIBATA) += libata.o
>> COBJS-$(CONFIG_PATA_BFIN) += pata_bfin.o
>> COBJS-$(CONFIG_SATA_SIL3114) += sata_sil3114.o
>> -COBJS-$(CONFIG_IDE_SIL680) += sil680.o
>> +COBJS-$(CONFIG_SCSI_AHCI) += ahci.o
>> COBJS-$(CONFIG_SCSI_SYM53C8XX) += sym53c8xx.o
>> COBJS-$(CONFIG_SYSTEMACE) += systemace.o
>>
>> diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
>> new file mode 100644
>> index 0000000..4454fca
>> --- /dev/null
>> +++ b/drivers/block/mg_disk.c
>> +
>> +#define MG_BASE (host.drv_data->base)
> an inline function will be better
This isn't a function.
>> +
>> +
>> +/*
>> + * copy src to dest, skipping leading and trailing blanks and null
>> + * terminate the string
>> + * "len" is the size of available memory including the terminating '\0'
>> + */
>> +static void mg_ident_cpy (unsigned char *dst, unsigned char *src,
>> + unsigned int len)
>> +{
>> + unsigned char *end, *last;
>> +
>> + last = dst;
>> + end = src + len - 1;
>> +
>> + /* reserve space for '\0' */
>> + if (len < 2)
>> + goto OUT;
>> +
>> + /* skip leading white space */
>> + while ((*src) && (src<end) && (*src==' '))
> please add a space before and after '<' '==' & co
>> + ++src;
>> +
>> + /* copy string, omitting trailing white space */
>> + while ((*src) && (src<end)) {
>> + *dst++ = *src;
>> + if (*src++ != ' ')
>> + last = dst;
>> + }
>> +OUT:
>> + *last = '\0';
>> +}
> why do you need this?
for parsing string parts of ATAID
>> +static unsigned int mg_do_read_sects(void *buff, u32 sect_num, u32 sect_cnt)
>> +{
>> + u32 i, j, err;
>> + u8 *buff_ptr = buff;
>> +
>> + err = mg_out(sect_num, sect_cnt, MG_CMD_RD);
>> + if (err)
>> + return err;
>> +
>> + for (i = 0; i < sect_cnt; i++) {
>> + err = mg_wait(MG_REG_STATUS_BIT_DATA_REQ, 3000);
>> + if (err)
>> + return err;
>> +
>> + /* TODO : u16 unaligned case */
>> + for(j = 0; j < MG_SECTOR_SIZE >> 1; j++) {
>> + *(u16 *)buff_ptr =
>> + readw(MG_BASE + MG_BUFF_OFFSET + (j << 1));
> ??
I can't guess your intention. Please write more clearly
>> + buff_ptr += 2;
>> + }
>> +
>> + writeb(MG_CMD_RD_CONF, MG_BASE + MG_REG_COMMAND);
>> +
>> + MG_DBG("%u (0x%8.8x) sector read", sect_num + i,
>> + (sect_num + i) * MG_SECTOR_SIZE);
>> + }
>> +
>> + return err;
>> +}
>> +unsigned int mg_disk_read_sects(void *buff, u32 sect_num, u32 sect_cnt)
>> +{
>> + u32 quotient, residue, i, err;
>> + u8 *buff_ptr = buff;
>> +
>> + quotient = sect_cnt >> 8;
>> + residue = sect_cnt % 256;
>> +
>> + for (i = 0; i < quotient; i++) {
>> + MG_DBG("sect num : %u buff : 0x%8.8x", sect_num, (u32)buff_ptr);
>> + err = mg_do_read_sects(buff_ptr, sect_num, 256);
>> + if (err)
>> + return err;
>> + sect_num += 256;
>> + buff_ptr += 256 * MG_SECTOR_SIZE;
>> + }
>> +
>> + if (residue) {
>> + MG_DBG("sect num : %u buff : %8.8x", sect_num, (u32)buff_ptr);
> please use debug(x)
MG_DBG prints lots of messages. I think changing MG_DBG to debug might
confuse other driver's debug message.
If u-boot policy only allow debug(x), I'll follow.
>> + err = mg_do_read_sects(buff_ptr, sect_num, residue);
>> + }
>> +
>> + return err;
>> +}
>> +/* must override this function */
>> +struct mg_drv_data * __attribute__((weak)) mg_get_drv_data (void)
>> +{
>> + puts ("### WARNING ### port mg_get_drv_data function\n");
>> + return NULL;
>> +}
> please do an compile error not a run time error
IMHO, compile error (or warning) is not a good choice for this case.
Compile time error always generate error even though override function
exist.
Also mg_disk_init() function will generate run time error when weak
function used. Typically, users will be read README.mflash that explains
how to override this function and finally port appropriately.
Regards,
unsik Kim
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