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Commit 3b151526 authored by Ajay Kumar Gupta's avatar Ajay Kumar Gupta Committed by Greg Kroah-Hartman
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USB: musb: Add new fifo table for a OMAP3 errata 



We have observed MSC data read corruption when USB LAN device is
also connected and it's interface is up.

Silicon team has confirmed an errata where in all the active
transfers should use FIFO space either in first 8K or next 8K.
So far we have observed the issue in above use case scenario.

As a workaround to it, adding a new FIFO config (5) fitting well
within first 8K which can be used for such use cases.

Signed-off-by: default avatarAjay Kumar Gupta <ajay.gupta@ti.com>
Acked-by: default avatarAnand Gadiyar <gadiyar@ti.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 8f20960c

drivers/usb/musb/musb_core.c

+34 −0
Original line number Diff line number Diff line
@@ -1095,6 +1095,36 @@ static struct fifo_cfg __initdata mode_4_cfg[] = { 
{ .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },

};



/* mode 5 - fits in 8KB */

static struct fifo_cfg __initdata mode_5_cfg[] = {

{ .hw_ep_num =  1, .style = FIFO_TX,   .maxpacket = 512, },

{ .hw_ep_num =  1, .style = FIFO_RX,   .maxpacket = 512, },

{ .hw_ep_num =  2, .style = FIFO_TX,   .maxpacket = 512, },

{ .hw_ep_num =  2, .style = FIFO_RX,   .maxpacket = 512, },

{ .hw_ep_num =  3, .style = FIFO_TX,   .maxpacket = 512, },

{ .hw_ep_num =  3, .style = FIFO_RX,   .maxpacket = 512, },

{ .hw_ep_num =  4, .style = FIFO_TX,   .maxpacket = 512, },

{ .hw_ep_num =  4, .style = FIFO_RX,   .maxpacket = 512, },

{ .hw_ep_num =  5, .style = FIFO_TX,   .maxpacket = 512, },

{ .hw_ep_num =  5, .style = FIFO_RX,   .maxpacket = 512, },

{ .hw_ep_num =  6, .style = FIFO_TX,   .maxpacket = 32, },

{ .hw_ep_num =  6, .style = FIFO_RX,   .maxpacket = 32, },

{ .hw_ep_num =  7, .style = FIFO_TX,   .maxpacket = 32, },

{ .hw_ep_num =  7, .style = FIFO_RX,   .maxpacket = 32, },

{ .hw_ep_num =  8, .style = FIFO_TX,   .maxpacket = 32, },

{ .hw_ep_num =  8, .style = FIFO_RX,   .maxpacket = 32, },

{ .hw_ep_num =  9, .style = FIFO_TX,   .maxpacket = 32, },

{ .hw_ep_num =  9, .style = FIFO_RX,   .maxpacket = 32, },

{ .hw_ep_num = 10, .style = FIFO_TX,   .maxpacket = 32, },

{ .hw_ep_num = 10, .style = FIFO_RX,   .maxpacket = 32, },

{ .hw_ep_num = 11, .style = FIFO_TX,   .maxpacket = 32, },

{ .hw_ep_num = 11, .style = FIFO_RX,   .maxpacket = 32, },

{ .hw_ep_num = 12, .style = FIFO_TX,   .maxpacket = 32, },

{ .hw_ep_num = 12, .style = FIFO_RX,   .maxpacket = 32, },

{ .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 512, },

{ .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },

{ .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },

};



/*

 * configure a fifo; for non-shared endpoints, this may be called
@@ -1210,6 +1240,10 @@ static int __init ep_config_from_table(struct musb *musb) 
		cfg = mode_4_cfg;

		n = ARRAY_SIZE(mode_4_cfg);

		break;

	case 5:

		cfg = mode_5_cfg;

		n = ARRAY_SIZE(mode_5_cfg);

		break;

	}



	printk(KERN_DEBUG "%s: setup fifo_mode %d\n",