summaryrefslogtreecommitdiffstats
path: root/drivers/usb/host/isp1760-hcd.c
diff options
context:
space:
mode:
authorNate Case <ncase@xes-inc.com>2008-06-17 11:11:38 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2008-07-21 15:16:33 -0700
commit3faefc88c1a32b0b4a00b9089fab5d917996b16c (patch)
tree705994b76bea1968e3ae7d4149bd77139374220c /drivers/usb/host/isp1760-hcd.c
parent6d243e5c76b632a94d54cac2fe7fe8c0b41cd482 (diff)
USB: isp1760: Support board-specific hardware configurations
This adds support for hardware configurations that don't match the chip default register settings (e.g., 16-bit data bus, DACK and DREQ pulled up instead of down, analog overcurrent mode). These settings are passed in via the OF device tree. The PCI interface still assumes the same default values. Signed-off-by: Nate Case <ncase@xes-inc.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/isp1760-hcd.c')
-rw-r--r--drivers/usb/host/isp1760-hcd.c67
1 files changed, 53 insertions, 14 deletions
diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c
index d318af39c27..c858f2adb92 100644
--- a/drivers/usb/host/isp1760-hcd.c
+++ b/drivers/usb/host/isp1760-hcd.c
@@ -38,6 +38,7 @@ struct isp1760_hcd {
unsigned i_thresh;
unsigned long reset_done;
unsigned long next_statechange;
+ unsigned int devflags;
};
static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
@@ -378,9 +379,31 @@ static int isp1760_hc_setup(struct usb_hcd *hcd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
int result;
- u32 scratch;
+ u32 scratch, hwmode;
+
+ /* Setup HW Mode Control: This assumes a level active-low interrupt */
+ hwmode = HW_DATA_BUS_32BIT;
+
+ if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16)
+ hwmode &= ~HW_DATA_BUS_32BIT;
+ if (priv->devflags & ISP1760_FLAG_ANALOG_OC)
+ hwmode |= HW_ANA_DIGI_OC;
+ if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH)
+ hwmode |= HW_DACK_POL_HIGH;
+ if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
+ hwmode |= HW_DREQ_POL_HIGH;
+
+ /*
+ * We have to set this first in case we're in 16-bit mode.
+ * Write it twice to ensure correct upper bits if switching
+ * to 16-bit mode.
+ */
+ isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
+ isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
isp1760_writel(0xdeadbabe, hcd->regs + HC_SCRATCH_REG);
+ /* Change bus pattern */
+ scratch = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
scratch = isp1760_readl(hcd->regs + HC_SCRATCH_REG);
if (scratch != 0xdeadbabe) {
printk(KERN_ERR "ISP1760: Scratch test failed.\n");
@@ -403,17 +426,29 @@ static int isp1760_hc_setup(struct usb_hcd *hcd)
/* Step 11 passed */
- isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
- isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);
+ isp1760_info(priv, "bus width: %d, oc: %s\n",
+ (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ?
+ 16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ?
+ "analog" : "digital");
/* ATL reset */
- scratch = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
- isp1760_writel(scratch | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
+ isp1760_writel(hwmode | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
mdelay(10);
- isp1760_writel(scratch, hcd->regs + HC_HW_MODE_CTRL);
+ isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
- isp1760_writel(PORT1_POWER | PORT1_INIT2, hcd->regs + HC_PORT1_CTRL);
- mdelay(10);
+ isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
+ isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);
+
+ /*
+ * PORT 1 Control register of the ISP1760 is the OTG control
+ * register on ISP1761.
+ */
+ if (!(priv->devflags & ISP1760_FLAG_ISP1761) &&
+ !(priv->devflags & ISP1760_FLAG_PORT1_DIS)) {
+ isp1760_writel(PORT1_POWER | PORT1_INIT2,
+ hcd->regs + HC_PORT1_CTRL);
+ mdelay(10);
+ }
priv->hcs_params = isp1760_readl(hcd->regs + HC_HCSPARAMS);
@@ -453,8 +488,7 @@ static int isp1760_run(struct usb_hcd *hcd)
hcd->state = HC_STATE_RUNNING;
isp1760_enable_interrupts(hcd);
temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
- temp |= FINAL_HW_CONFIG;
- isp1760_writel(temp, hcd->regs + HC_HW_MODE_CTRL);
+ isp1760_writel(temp | HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
command = isp1760_readl(hcd->regs + HC_USBCMD);
command &= ~(CMD_LRESET|CMD_RESET);
@@ -2112,6 +2146,7 @@ static int isp1760_get_frame(struct usb_hcd *hcd)
static void isp1760_stop(struct usb_hcd *hcd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
+ u32 temp;
isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
NULL, 0);
@@ -2120,7 +2155,8 @@ static void isp1760_stop(struct usb_hcd *hcd)
spin_lock_irq(&priv->lock);
ehci_reset(priv);
/* Disable IRQ */
- isp1760_writel(HW_DATA_BUS_32BIT, hcd->regs + HC_HW_MODE_CTRL);
+ temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
+ isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
spin_unlock_irq(&priv->lock);
isp1760_writel(0, hcd->regs + HC_CONFIGFLAG);
@@ -2128,10 +2164,11 @@ static void isp1760_stop(struct usb_hcd *hcd)
static void isp1760_shutdown(struct usb_hcd *hcd)
{
- u32 command;
+ u32 command, temp;
isp1760_stop(hcd);
- isp1760_writel(HW_DATA_BUS_32BIT, hcd->regs + HC_HW_MODE_CTRL);
+ temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
+ isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
command = isp1760_readl(hcd->regs + HC_USBCMD);
command &= ~CMD_RUN;
@@ -2183,7 +2220,8 @@ void deinit_kmem_cache(void)
}
struct usb_hcd *isp1760_register(u64 res_start, u64 res_len, int irq,
- u64 irqflags, struct device *dev, const char *busname)
+ u64 irqflags, struct device *dev, const char *busname,
+ unsigned int devflags)
{
struct usb_hcd *hcd;
struct isp1760_hcd *priv;
@@ -2200,6 +2238,7 @@ struct usb_hcd *isp1760_register(u64 res_start, u64 res_len, int irq,
return ERR_PTR(-ENOMEM);
priv = hcd_to_priv(hcd);
+ priv->devflags = devflags;
init_memory(priv);
hcd->regs = ioremap(res_start, res_len);
if (!hcd->regs) {