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Date: Fri, 18 Jul 2014 19:01:40 +0200
From: Stefan Agner <stefan@...er.ch>
To: peter.chen@...escale.com, s.hauer@...gutronix.de,
shawn.guo@...escale.com
Cc: b35083@...escale.com, linux-arm-kernel@...ts.infradead.org,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
stefan@...er.ch
Subject: [PATCH 4/6] chipidea: usbmisc_imx: Add USB support for VF610 SoCs
This adds Vybrid VF610 SoC support. The IP is very similar to i.MX6,
however the non-core registers are spread in two different register
areas. Hence we support multiple registers which are addressed by
the index of usbmisc.
Signed-off-by: Stefan Agner <stefan@...er.ch>
---
I tried first to create two usbmisc nodes and hoped it would instanciate
the driver twice, however, the driver currently only supports one instance.
In an short attempt to add support for that, I realized that since the
data structure holding the information for each instance is within the
driver ci_hdrc_imx. For Vybrid two instances would make much more sense,
however, a i.MX6Q shares all the non-core registers in one register area,
hence only one driver can map this area. I ended up with this multiple
registers solution, altough for the Vybrid multiple instances would
probably make more sense. Any thoughts on this?
drivers/usb/chipidea/usbmisc_imx.c | 76 +++++++++++++++++++++++++++-----------
1 file changed, 54 insertions(+), 22 deletions(-)
diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 85293b8..61c2350 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -57,6 +57,10 @@
#define MX6_BM_OVER_CUR_DIS BIT(7)
+#define VF610_OVER_CUR_DIS BIT(7)
+
+#define MAX_BASE_ADDR 2
+
struct usbmisc_ops {
/* It's called once when probe a usb device */
int (*init)(struct imx_usbmisc_data *data);
@@ -65,7 +69,7 @@ struct usbmisc_ops {
};
struct imx_usbmisc {
- void __iomem *base;
+ void __iomem *base[MAX_BASE_ADDR];
spinlock_t lock;
struct clk *clk;
const struct usbmisc_ops *ops;
@@ -84,20 +88,20 @@ static int usbmisc_imx25_init(struct imx_usbmisc_data *data)
spin_lock_irqsave(&usbmisc->lock, flags);
switch (data->index) {
case 0:
- val = readl(usbmisc->base);
+ val = readl(usbmisc->base[0]);
val &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PP_BIT);
val |= (MX25_EHCI_INTERFACE_DIFF_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT;
val |= (MX25_OTG_PM_BIT | MX25_OTG_OCPOL_BIT);
- writel(val, usbmisc->base);
+ writel(val, usbmisc->base[0]);
break;
case 1:
- val = readl(usbmisc->base);
+ val = readl(usbmisc->base[0]);
val &= ~(MX25_H1_SIC_MASK | MX25_H1_PP_BIT | MX25_H1_IPPUE_UP_BIT);
val |= (MX25_EHCI_INTERFACE_SINGLE_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT;
val |= (MX25_H1_PM_BIT | MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT |
MX25_H1_USBTE_BIT | MX25_H1_IPPUE_DOWN_BIT);
- writel(val, usbmisc->base);
+ writel(val, usbmisc->base[0]);
break;
}
@@ -115,7 +119,7 @@ static int usbmisc_imx25_post(struct imx_usbmisc_data *data)
if (data->index > 2)
return -EINVAL;
- reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
+ reg = usbmisc->base[0] + MX25_USB_PHY_CTRL_OFFSET;
if (data->evdo) {
spin_lock_irqsave(&usbmisc->lock, flags);
@@ -149,10 +153,10 @@ static int usbmisc_imx27_init(struct imx_usbmisc_data *data)
spin_lock_irqsave(&usbmisc->lock, flags);
if (data->disable_oc)
- val = readl(usbmisc->base) | val;
+ val = readl(usbmisc->base[0]) | val;
else
- val = readl(usbmisc->base) & ~val;
- writel(val, usbmisc->base);
+ val = readl(usbmisc->base[0]) & ~val;
+ writel(val, usbmisc->base[0]);
spin_unlock_irqrestore(&usbmisc->lock, flags);
return 0;
@@ -168,29 +172,29 @@ static int usbmisc_imx53_init(struct imx_usbmisc_data *data)
return -EINVAL;
/* Select a 24 MHz reference clock for the PHY */
- reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET;
+ reg = usbmisc->base[0] + MX53_USB_OTG_PHY_CTRL_1_OFFSET;
val = readl(reg);
val &= ~MX53_USB_PHYCTRL1_PLLDIV_MASK;
val |= MX53_USB_PLL_DIV_24_MHZ;
- writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
+ writel(val, usbmisc->base[0] + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
if (data->disable_oc) {
spin_lock_irqsave(&usbmisc->lock, flags);
switch (data->index) {
case 0:
- reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
+ reg = usbmisc->base[0] + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
break;
case 1:
- reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
+ reg = usbmisc->base[0] + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
break;
case 2:
- reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
+ reg = usbmisc->base[0] + MX53_USB_UH2_CTRL_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
break;
case 3:
- reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
+ reg = usbmisc->base[0] + MX53_USB_UH3_CTRL_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
break;
}
@@ -212,15 +216,31 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
if (data->disable_oc) {
spin_lock_irqsave(&usbmisc->lock, flags);
- reg = readl(usbmisc->base + data->index * 4);
+ reg = readl(usbmisc->base[0] + data->index * 4);
writel(reg | MX6_BM_OVER_CUR_DIS,
- usbmisc->base + data->index * 4);
+ usbmisc->base[0] + data->index * 4);
spin_unlock_irqrestore(&usbmisc->lock, flags);
}
return 0;
}
+static int usbmisc_vf610_init(struct imx_usbmisc_data *data)
+{
+ u32 reg;
+
+ if (data->index >= 2)
+ return -EINVAL;
+
+ if (data->disable_oc) {
+ reg = readl(usbmisc->base[data->index]);
+ writel(reg | VF610_OVER_CUR_DIS,
+ usbmisc->base[data->index]);
+ }
+
+ return 0;
+}
+
static const struct usbmisc_ops imx25_usbmisc_ops = {
.init = usbmisc_imx25_init,
.post = usbmisc_imx25_post,
@@ -238,6 +258,10 @@ static const struct usbmisc_ops imx6q_usbmisc_ops = {
.init = usbmisc_imx6q_init,
};
+static const struct usbmisc_ops vf610_usbmisc_ops = {
+ .init = usbmisc_vf610_init,
+};
+
int imx_usbmisc_init(struct imx_usbmisc_data *data)
{
if (!usbmisc)
@@ -283,6 +307,10 @@ static const struct of_device_id usbmisc_imx_dt_ids[] = {
.compatible = "fsl,imx6q-usbmisc",
.data = &imx6q_usbmisc_ops,
},
+ {
+ .compatible = "fsl,vf610-usbmisc",
+ .data = &vf610_usbmisc_ops,
+ },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids);
@@ -291,7 +319,7 @@ static int usbmisc_imx_probe(struct platform_device *pdev)
{
struct resource *res;
struct imx_usbmisc *data;
- int ret;
+ int ret, i;
struct of_device_id *tmp_dev;
if (usbmisc)
@@ -303,10 +331,14 @@ static int usbmisc_imx_probe(struct platform_device *pdev)
spin_lock_init(&data->lock);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- data->base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(data->base))
- return PTR_ERR(data->base);
+ for (i = 0; i < MAX_BASE_ADDR; i++) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, i);
+ data->base[i] = devm_ioremap_resource(&pdev->dev, res);
+
+ /* First base address is mandatory */
+ if (IS_ERR(data->base) && !i)
+ return PTR_ERR(data->base);
+ }
data->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(data->clk)) {
--
2.0.1
--
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