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authorCory Maccarrone <darkstar6262@gmail.com>2009-11-22 10:10:52 -0800
committerTony Lindgren <tony@atomide.com>2009-11-22 10:24:32 -0800
commit45f780a06153544ab84fd1da3a8b28c07f61da1d (patch)
treea2821193afd713c978a828f3dc6d1a05da6ea298 /drivers/usb
parent490a56652295825e3006f8703d96da2ef6580318 (diff)
omap1: omap_udc: Add clocking and disable vbus sense for omap7xx
The l3_ocpi_ck clock is needed on omap7xx processors for USB. Additionally, bit 8 of the SOFT_REQ_REG needs to be enabled for the usb_dc_ck on omap7xx, which is a different bit than that of the omap16xx-defined clock of the same name. I added a provision for the usb_dc_ck and l3_ocpi_ck clocks as dc_clk and hhc_clk, respectively, for omap7xx CPUs. Additionally, I added a check in machine_without_vbus_sense for all omap7xx devices, as presently I know of no omap7xx-based devices that have vbus sense, and it made more sense to me to use a cpu check here than to spell out each machine one at a time. Finally, DMA is disabled for omap7xx, as it causes problems with these chips. Cc: linux-usb@vger.kernel.org Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Cory Maccarrone <darkstar6262@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/omap_udc.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index b836efe9ea7..f81e4f025f2 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -2098,6 +2098,7 @@ static inline int machine_without_vbus_sense(void)
|| machine_is_omap_h4()
#endif
|| machine_is_sx1()
+ || cpu_is_omap7xx() /* No known omap7xx boards with vbus sense */
);
}
@@ -2838,6 +2839,16 @@ static int __init omap_udc_probe(struct platform_device *pdev)
udelay(100);
}
+ if (cpu_is_omap7xx()) {
+ dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
+ hhc_clk = clk_get(&pdev->dev, "l3_ocpi_ck");
+ BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
+ /* can't use omap_udc_enable_clock yet */
+ clk_enable(dc_clk);
+ clk_enable(hhc_clk);
+ udelay(100);
+ }
+
INFO("OMAP UDC rev %d.%d%s\n",
omap_readw(UDC_REV) >> 4, omap_readw(UDC_REV) & 0xf,
config->otg ? ", Mini-AB" : "");
@@ -2970,7 +2981,7 @@ known:
goto cleanup3;
}
#endif
- if (cpu_is_omap16xx()) {
+ if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
udc->dc_clk = dc_clk;
udc->hhc_clk = hhc_clk;
clk_disable(hhc_clk);
@@ -3008,7 +3019,7 @@ cleanup0:
if (xceiv)
otg_put_transceiver(xceiv);
- if (cpu_is_omap16xx() || cpu_is_omap24xx()) {
+ if (cpu_is_omap16xx() || cpu_is_omap24xx() || cpu_is_omap7xx()) {
clk_disable(hhc_clk);
clk_disable(dc_clk);
clk_put(hhc_clk);
@@ -3115,6 +3126,10 @@ static struct platform_driver udc_driver = {
static int __init udc_init(void)
{
+ /* Disable DMA for omap7xx -- it doesn't work right. */
+ if (cpu_is_omap7xx())
+ use_dma = 0;
+
INFO("%s, version: " DRIVER_VERSION
#ifdef USE_ISO
" (iso)"