Hello, I'm using a prototype board running a AT91sam9g20 processor. I have a libertas sdio wifi chip connected to my MCI controller. I've applied the 2.6.32 bsp patch. When I power up the board (power on reset), the sdio chip is well probed by the mci controller. But when i reset the board, the mmc_rescan function failed because the call to /* * First we search for SDIO... */ err = mmc_send_io_op_cond(host, 0, &ocr); return 110; so my sdio chip is not recognized by my kernel. I've tried to apply that patch "sdio : recognize io card without powercycle" ( 516a82422209e078345d0ca54b16793d7bfd4782 ) without success. Here is a dump of the mmc dialogue when the board is only reseted : [ 1.160000] mmc0: starting CMD52 arg 00000c00 flags 00000195 [ 1.160000] Sending command 52 as 00001874, arg = 00000C00, blocks = 0, length = 0 (MR = 00009B7C) [ 1.160000] MCI irq: status = 0000C0E5, C07F0001, 00000001 [ 1.160000] Command ready [ 1.160000] Completed command [ 1.160000] Status = 00000001/0000c0e5 [00001000 00000000 00000000 00000000] [ 1.160000] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000 [ 1.160000] mmc0: starting CMD52 arg 80000c08 flags 00000195 [ 1.160000] Sending command 52 as 00001874, arg = 80000C08, blocks = 0, length = 0 (MR = 00009B7C) [ 1.160000] MCI irq: status = 0000C0E5, C07F0001, 00000001 [ 1.160000] Command ready [ 1.160000] Completed command [ 1.160000] Status = 00000001/0000c0e5 [00001008 00000000 00000000 00000000] [ 1.160000] mmc0: req done (CMD52): 0: 00001008 00000000 00000000 00000000 [ 1.160000] mmc0: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 21 width 0 timing 0 [ 1.160000] clkdiv = 124. mcck = 397312 [ 1.160000] MMC: Setting controller bus width to 1 [ 1.160000] mmc0: starting CMD0 arg 00000000 flags 000000c0 [ 1.160000] Sending command 0 as 00000800, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.160000] MCI irq: status = 0000C0E5, C07F0001, 00000001 [ 1.160000] Command ready [ 1.160000] Completed command [ 1.160000] Status = 00000001/0000c0e5 [00001008 00000000 00000000 00000000] [ 1.160000] mmc0: req done (CMD0): 0: 00001008 00000000 00000000 00000000 [ 1.160000] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0 [ 1.160000] clkdiv = 124. mcck = 397312 [ 1.160000] MMC: Setting controller bus width to 1 [ 1.160000] mmc0: starting CMD8 arg 000001aa flags 000002f5 [ 1.160000] Sending command 8 as 00001848, arg = 000001AA, blocks = 0, length = 0 (MR = 00009B7C) [ 1.160000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.160000] MMC: Response timeout [ 1.160000] Completed command [ 1.160000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.160000] Error detected and set to -110/0 (cmd = 8, retries = 0) [ 1.160000] mmc0: req done (CMD8): -110: 00001008 00000000 00000000 00000000 [ 1.160000] mmc0: starting CMD5 arg 00000000 flags 000002e1 [ 1.160000] Sending command 5 as 00001845, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.160000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.160000] MMC: Response timeout [ 1.160000] Completed command [ 1.160000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.160000] Error detected and set to -110/0 (cmd = 5, retries = 3) [ 1.160000] mmc0: req failed (CMD5): -110, retrying... [ 1.160000] Sending command 5 as 00001845, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.170000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.170000] MMC: Response timeout [ 1.170000] Completed command [ 1.170000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.170000] Error detected and set to -110/0 (cmd = 5, retries = 2) [ 1.170000] mmc0: req failed (CMD5): -110, retrying... [ 1.170000] Sending command 5 as 00001845, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.170000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.170000] MMC: Response timeout [ 1.170000] Completed command [ 1.170000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.170000] Error detected and set to -110/0 (cmd = 5, retries = 1) [ 1.170000] mmc0: req failed (CMD5): -110, retrying... [ 1.170000] Sending command 5 as 00001845, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.170000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.170000] MMC: Response timeout [ 1.170000] Completed command [ 1.170000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.170000] Error detected and set to -110/0 (cmd = 5, retries = 0) [ 1.170000] mmc0: req done (CMD5): -110: 00001008 00000000 00000000 00000000 [ 1.170000] mmc0: starting CMD55 arg 00000000 flags 000000f5 [ 1.170000] Sending command 55 as 00001877, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.180000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.180000] MMC: Response timeout [ 1.180000] Completed command [ 1.180000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.180000] Error detected and set to -110/0 (cmd = 55, retries = 0) [ 1.180000] mmc0: req done (CMD55): -110: 00001008 00000000 00000000 00000000 [ 1.180000] mmc0: starting CMD55 arg 00000000 flags 000000f5 [ 1.180000] Sending command 55 as 00001877, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.180000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.180000] MMC: Response timeout [ 1.180000] Completed command [ 1.180000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.180000] Error detected and set to -110/0 (cmd = 55, retries = 0) [ 1.180000] mmc0: req done (CMD55): -110: 00001008 00000000 00000000 00000000 [ 1.180000] mmc0: starting CMD55 arg 00000000 flags 000000f5 [ 1.180000] Sending command 55 as 00001877, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.180000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.180000] MMC: Response timeout [ 1.180000] Completed command [ 1.180000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.180000] Error detected and set to -110/0 (cmd = 55, retries = 0) [ 1.180000] mmc0: req done (CMD55): -110: 00001008 00000000 00000000 00000000 [ 1.180000] mmc0: starting CMD55 arg 00000000 flags 000000f5 [ 1.180000] Sending command 55 as 00001877, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.180000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.180000] MMC: Response timeout [ 1.180000] Completed command [ 1.180000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.180000] Error detected and set to -110/0 (cmd = 55, retries = 0) [ 1.180000] mmc0: req done (CMD55): -110: 00001008 00000000 00000000 00000000 [ 1.180000] mmc0: starting CMD1 arg 00000000 flags 000000e1 [ 1.180000] Clearing timeout [ 1.180000] Clearing: SR = 0000C0E4 [ 1.180000] Clearing: SR = 0000C0E4 [ 1.180000] Clearing: SR = 0000C0E4 [ 1.180000] Clearing: SR = 0000C0E4 [ 1.180000] Sending command 1 as 00001841, arg = 00000000, blocks = 0, length = 0 (MR = 00009B7C) [ 1.180000] MCI irq: status = 0010C0E4, C07F0001, 00100000 [ 1.180000] MMC: Response timeout [ 1.180000] Completed command [ 1.180000] Status = 00100000/0010c0e5 [00001008 00000000 00000000 00000000] [ 1.180000] Error detected and set to -110/0 (cmd = 1, retries = 0) [ 1.180000] mmc0: req done (CMD1): -110: 00001008 00000000 00000000 00000000 [ 1.180000] mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0 [ 1.180000] MMC: Setting controller bus width to 1 Thanks in advance for any suggestion, Regards, D.MOUSSAUD. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
