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https://github.com/brain-hackers/u-boot-brain
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Add a hook to allow board-specific PIO mode setting.
This patch adds a hook whereby a board-specific routine can be called to configure hardware for a PIO mode. The prototype for the board-specific routine is: int inline ide_set_piomode(int pio_mode) ide_set_piomode should be prepared to configure hardware for a pio_mode between 0 and 6, inclusive. It should return 0 on success or 1 on failure. Signed-off-by: Steven A. Falco <sfalco@harris.com>
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@ -543,6 +543,16 @@ __ide_inb(int dev, int port)
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unsigned char inline ide_inb(int dev, int port)
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unsigned char inline ide_inb(int dev, int port)
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__attribute__((weak, alias("__ide_inb")));
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__attribute__((weak, alias("__ide_inb")));
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#ifdef CONFIG_TUNE_PIO
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int inline
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__ide_set_piomode(int pio_mode)
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{
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return 0;
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}
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int inline ide_set_piomode(int pio_mode)
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__attribute__((weak, alias("__ide_set_piomode")));
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#endif
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void ide_init (void)
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void ide_init (void)
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{
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{
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@ -1053,6 +1063,10 @@ static void ide_ident (block_dev_desc_t *dev_desc)
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int do_retry = 0;
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int do_retry = 0;
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#endif
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#endif
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#ifdef CONFIG_TUNE_PIO
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int pio_mode;
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#endif
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#if 0
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#if 0
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int mode, cycle_time;
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int mode, cycle_time;
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#endif
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#endif
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@ -1168,6 +1182,38 @@ static void ide_ident (block_dev_desc_t *dev_desc)
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else
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else
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dev_desc->removable = 0;
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dev_desc->removable = 0;
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#ifdef CONFIG_TUNE_PIO
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/* Mode 0 - 2 only, are directly determined by word 51. */
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pio_mode = iop->tPIO;
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if (pio_mode > 2) {
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printf("WARNING: Invalid PIO (word 51 = %d).\n", pio_mode);
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pio_mode = 0; /* Force it to dead slow, and hope for the best... */
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}
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/* Any CompactFlash Storage Card that supports PIO mode 3 or above
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* shall set bit 1 of word 53 to one and support the fields contained
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* in words 64 through 70.
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*/
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if (iop->field_valid & 0x02) {
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/* Mode 3 and above are possible. Check in order from slow
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* to fast, so we wind up with the highest mode allowed.
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*/
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if (iop->eide_pio_modes & 0x01)
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pio_mode = 3;
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if (iop->eide_pio_modes & 0x02)
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pio_mode = 4;
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if (ata_id_is_cfa((u16 *)iop)) {
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if ((iop->cf_advanced_caps & 0x07) == 0x01)
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pio_mode = 5;
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if ((iop->cf_advanced_caps & 0x07) == 0x02)
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pio_mode = 6;
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}
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}
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/* System-specific, depends on bus speeds, etc. */
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ide_set_piomode(pio_mode);
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#endif /* CONFIG_TUNE_PIO */
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#if 0
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#if 0
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/*
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/*
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* Drive PIO mode autoselection
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* Drive PIO mode autoselection
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@ -236,7 +236,9 @@ typedef struct hd_driveid {
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unsigned short words130_155[26];/* reserved vendor words 130-155 */
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unsigned short words130_155[26];/* reserved vendor words 130-155 */
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unsigned short word156;
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unsigned short word156;
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unsigned short words157_159[3];/* reserved vendor words 157-159 */
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unsigned short words157_159[3];/* reserved vendor words 157-159 */
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unsigned short words160_255[95];/* reserved words 160-255 */
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unsigned short words160_162[3];/* reserved words 160-162 */
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unsigned short cf_advanced_caps;
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unsigned short words164_255[92];/* reserved words 164-255 */
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} hd_driveid_t;
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} hd_driveid_t;
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