[PATCH 0/3] ocp2scp: add non-dt support

[PATCH 0/3] ocp2scp: add non-dt support

[Kishon Vijay Abraham I]

This patch series allows ocp2scp driver to create its child devices
from the platform data.

In omap platforms, usb phy is connected to ocp2scp and usb phy is needed
for MUSB to be functional. When ocp2scp driver was added, it had only dt
support which means it wont create usb phy devices for non-dt boot.

This patch series adds non-dt support to ocp2scp and this series is needed
for getting MUSB functioanl in non-dt boot.

This patch series is rebased on linux-next. Let me know if it had to be
based on some other tree.

Did a quick testing for g_zero enumeration in panda board.

Kishon Vijay Abraham I (3):
  drivers: bus: ocp2scp: add pdata support
  ARM: OMAP4: add _dev_attr_ to ocp2scp for representing usb_phy
  ARM: OMAP: ocp2scp: create omap device for ocp2scp

 arch/arm/mach-omap2/devices.c              |   72 ++++++++++++++++++++++++++++
 arch/arm/mach-omap2/omap_hwmod_44xx_data.c |   28 +++++++++++
 drivers/bus/omap-ocp2scp.c                 |   67 ++++++++++++++++++++++++--
 include/linux/platform_data/omap_ocp2scp.h |   31 ++++++++++++
 4 files changed, 195 insertions(+), 3 deletions(-)
 create mode 100644 include/linux/platform_data/omap_ocp2scp.h

-- 
1.7.9.5

[PATCH 1/3] drivers: bus: ocp2scp: add pdata support

[Kishon Vijay Abraham I]

ocp2scp was not having pdata support which makes *musb* fail for non-dt
boot in OMAP platform. The pdata will have information about the devices
that is connected to ocp2scp. ocp2scp driver will now make use of this
information to create the devices that is attached to ocp2scp.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 drivers/bus/omap-ocp2scp.c                 |   67 ++++++++++++++++++++++++++--
 include/linux/platform_data/omap_ocp2scp.h |   31 +++++++++++++
 2 files changed, 95 insertions(+), 3 deletions(-)
 create mode 100644 include/linux/platform_data/omap_ocp2scp.h

diff --git a/drivers/bus/omap-ocp2scp.c b/drivers/bus/omap-ocp2scp.c
index ff63560..5db8297 100644
--- a/drivers/bus/omap-ocp2scp.c
+++ b/drivers/bus/omap-ocp2scp.c
@@ -22,6 +22,26 @@
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/platform_data/omap_ocp2scp.h>
+
+/**
+ * _count_resources - count for the number of resources
+ * @res: struct resource *
+ *
+ * Count and return the number of resources populated for the device that is
+ * connected to ocp2scp.
+ */
+static unsigned _count_resources(struct resource *res)
+{
+	int cnt	= 0;
+
+	while (res->start != res->end) {
+		cnt++;
+		res++;
+	}
+
+	return cnt;
+}
 
 static int ocp2scp_remove_devices(struct device *dev, void *c)
 {
@@ -34,20 +54,61 @@ static int ocp2scp_remove_devices(struct device *dev, void *c)
 
 static int __devinit omap_ocp2scp_probe(struct platform_device *pdev)
 {
-	int			ret;
-	struct device_node	*np = pdev->dev.of_node;
+	int ret;
+	unsigned res_cnt, i;
+	struct device_node *np = pdev->dev.of_node;
+	struct platform_device *pdev_child;
+	struct omap_ocp2scp_platform_data *pdata = pdev->dev.platform_data;
+	struct omap_ocp2scp_dev *dev;
 
 	if (np) {
 		ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
 		if (ret) {
-			dev_err(&pdev->dev, "failed to add resources for ocp2scp child\n");
+			dev_err(&pdev->dev,
+			    "failed to add resources for ocp2scp child\n");
 			goto err0;
 		}
+	} else if (pdata) {
+		for (i = 0, dev = *pdata->devices; i < pdata->dev_cnt; i++,
+		    dev++) {
+			res_cnt = _count_resources(dev->res);
+
+			pdev_child = platform_device_alloc(dev->drv_name, -1);
+			if (!pdev_child) {
+				dev_err(&pdev->dev,
+				  "failed to allocate mem for ocp2scp child\n");
+				goto err0;
+			}
+
+			ret = platform_device_add_resources(pdev_child,
+			    dev->res, res_cnt);
+			if (ret) {
+				dev_err(&pdev->dev,
+				 "failed to add resources for ocp2scp child\n");
+				goto err1;
+			}
+
+			pdev_child->dev.parent	= &pdev->dev;
+
+			ret = platform_device_add(pdev_child);
+			if (ret) {
+				dev_err(&pdev->dev,
+				   "failed to register ocp2scp child device\n");
+				goto err1;
+			}
+		}
+	} else {
+		dev_err(&pdev->dev, "OCP2SCP initialized without plat data\n");
+		return -EINVAL;
 	}
+
 	pm_runtime_enable(&pdev->dev);
 
 	return 0;
 
+err1:
+	platform_device_put(pdev_child);
+
 err0:
 	device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
 
diff --git a/include/linux/platform_data/omap_ocp2scp.h b/include/linux/platform_data/omap_ocp2scp.h
new file mode 100644
index 0000000..5c6c393
--- /dev/null
+++ b/include/linux/platform_data/omap_ocp2scp.h
@@ -0,0 +1,31 @@
+/*
+ * omap_ocp2scp.h -- ocp2scp header file
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __DRIVERS_OMAP_OCP2SCP_H
+#define __DRIVERS_OMAP_OCP2SCP_H
+
+struct omap_ocp2scp_dev {
+	const char			*drv_name;
+	struct resource			*res;
+};
+
+struct omap_ocp2scp_platform_data {
+	int				dev_cnt;
+	struct omap_ocp2scp_dev		**devices;
+};
+#endif /* __DRIVERS_OMAP_OCP2SCP_H */
-- 
1.7.9.5

[PATCH 2/3] ARM: OMAP4: add _dev_attr_ to ocp2scp for representing usb_phy

[Kishon Vijay Abraham I]

In order to reflect devices(usb_phy) attached to ocp2scp bus, ocp2scp
is assigned a device attribute to represent the attached devices.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Benoit Cousson <b-cousson@ti.com>
---
 arch/arm/mach-omap2/omap_hwmod_44xx_data.c |   28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
index 652d028..cf579b5 100644
--- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
@@ -21,6 +21,7 @@
 #include <linux/io.h>
 #include <linux/platform_data/gpio-omap.h>
 #include <linux/power/smartreflex.h>
+#include <linux/platform_data/omap_ocp2scp.h>
 
 #include <plat/omap_hwmod.h>
 #include <plat/i2c.h>
@@ -2681,6 +2682,32 @@ static struct omap_hwmod_class omap44xx_ocp2scp_hwmod_class = {
 	.sysc	= &omap44xx_ocp2scp_sysc,
 };
 
+/* ocp2scp dev_attr */
+static struct resource omap44xx_usb_phy_and_pll_addrs[] = {
+	{
+		.name		= "usb_phy",
+		.start		= 0x4a0ad080,
+		.end		= 0x4a0ae000,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		/* XXX: Remove this once control module driver is in place */
+		.name		= "ctrl_dev",
+		.start		= 0x4a002300,
+		.end		= 0x4a002303,
+		.flags		= IORESOURCE_MEM,
+	},
+	{ }
+};
+
+static struct omap_ocp2scp_dev ocp2scp_dev_attr[] = {
+	{
+		.drv_name       = "omap-usb2",
+		.res		= omap44xx_usb_phy_and_pll_addrs,
+	},
+	{ }
+};
+
 /* ocp2scp_usb_phy */
 static struct omap_hwmod omap44xx_ocp2scp_usb_phy_hwmod = {
 	.name		= "ocp2scp_usb_phy",
@@ -2694,6 +2721,7 @@ static struct omap_hwmod omap44xx_ocp2scp_usb_phy_hwmod = {
 			.modulemode   = MODULEMODE_HWCTRL,
 		},
 	},
+	.dev_attr	= ocp2scp_dev_attr,
 };
 
 /*
-- 
1.7.9.5

[PATCH 3/3] ARM: OMAP: ocp2scp: create omap device for ocp2scp

[Kishon Vijay Abraham I]

Platfrom device for ocp2scp is created using omap_device_build in
devices file. This is used for both omap4(musb) and omap5(dwc3).

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 arch/arm/mach-omap2/devices.c |   72 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index c8c2117..e2ba505 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -19,6 +19,7 @@
 #include <linux/of.h>
 #include <linux/pinctrl/machine.h>
 #include <linux/platform_data/omap4-keypad.h>
+#include <linux/platform_data/omap_ocp2scp.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/map.h>
@@ -613,6 +614,76 @@ static void omap_init_vout(void)
 static inline void omap_init_vout(void) {}
 #endif
 
+#if defined(CONFIG_OMAP_OCP2SCP) || defined(CONFIG_OMAP_OCP2SCP_MODULE)
+static int count_ocp2scp_devices(struct omap_ocp2scp_dev *ocp2scp_dev)
+{
+	int cnt	= 0;
+
+	while (ocp2scp_dev->drv_name != NULL) {
+		cnt++;
+		ocp2scp_dev++;
+	}
+
+	return cnt;
+}
+
+static void omap_init_ocp2scp(void)
+{
+	struct omap_hwmod	*oh;
+	struct platform_device	*pdev;
+	int			bus_id = -1, dev_cnt = 0, i;
+	struct omap_ocp2scp_dev	*ocp2scp_dev;
+	const char		*oh_name, *name;
+	struct omap_ocp2scp_platform_data *pdata;
+
+	oh_name = "ocp2scp_usb_phy";
+	name	= "omap-ocp2scp";
+
+	oh = omap_hwmod_lookup(oh_name);
+	if (!oh) {
+		pr_err("%s: could not find omap_hwmod for %s\n", __func__,
+								oh_name);
+		return;
+	}
+
+	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+	if (!pdata) {
+		pr_err("%s: No memory for ocp2scp pdata\n", __func__);
+		return;
+	}
+
+	ocp2scp_dev = oh->dev_attr;
+	dev_cnt = count_ocp2scp_devices(ocp2scp_dev);
+
+	if (!dev_cnt) {
+		pr_err("%s: No devices connected to ocp2scp\n", __func__);
+		return;
+	}
+
+	pdata->devices = kzalloc(sizeof(struct omap_ocp2scp_dev *)
+					* dev_cnt, GFP_KERNEL);
+	if (!pdata->devices) {
+		pr_err("%s: No memory for ocp2scp pdata devices\n", __func__);
+		return;
+	}
+
+	for (i = 0; i < dev_cnt; i++, ocp2scp_dev++)
+		pdata->devices[i] = ocp2scp_dev;
+
+	pdata->dev_cnt	= dev_cnt;
+
+	pdev = omap_device_build(name, bus_id, oh, pdata, sizeof(*pdata), NULL,
+								0, false);
+	if (IS_ERR(pdev)) {
+		pr_err("Could not build omap_device for %s %s\n",
+						name, oh_name);
+		return;
+	}
+}
+#else
+static inline void omap_init_ocp2scp(void) { }
+#endif
+
 /*-------------------------------------------------------------------------*/
 
 static int __init omap2_init_devices(void)
@@ -640,6 +711,7 @@ static int __init omap2_init_devices(void)
 	omap_init_sham();
 	omap_init_aes();
 	omap_init_vout();
+	omap_init_ocp2scp();
 
 	return 0;
 }
-- 
1.7.9.5

Re: [PATCH 3/3] ARM: OMAP: ocp2scp: create omap device for ocp2scp

[Sergei Shtylyov]

Hello.

On 05-10-2012 12:07, Kishon Vijay Abraham I wrote:

> Platfrom device for ocp2scp is created using omap_device_build in
> devices file. This is used for both omap4(musb) and omap5(dwc3).
>
> Signed-off-by: Kishon Vijay Abraham I<kishon@ti.com>
> ---
>   arch/arm/mach-omap2/devices.c |   72 +++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 72 insertions(+)
>
> diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
> index c8c2117..e2ba505 100644
> --- a/arch/arm/mach-omap2/devices.c
> +++ b/arch/arm/mach-omap2/devices.c
[...]
> @@ -613,6 +614,76 @@ static void omap_init_vout(void)
[...]

> +static void omap_init_ocp2scp(void)
> +{
> +	struct omap_hwmod	*oh;
> +	struct platform_device	*pdev;
> +	int			bus_id = -1, dev_cnt = 0, i;
> +	struct omap_ocp2scp_dev	*ocp2scp_dev;
> +	const char		*oh_name, *name;
> +	struct omap_ocp2scp_platform_data *pdata;
> +
> +	oh_name = "ocp2scp_usb_phy";
> +	name	= "omap-ocp2scp";
> +
> +	oh = omap_hwmod_lookup(oh_name);
> +	if (!oh) {
> +		pr_err("%s: could not find omap_hwmod for %s\n", __func__,
> +								oh_name);
> +		return;
> +	}
> +
> +	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
> +	if (!pdata) {
> +		pr_err("%s: No memory for ocp2scp pdata\n", __func__);
> +		return;
> +	}
> +
> +	ocp2scp_dev = oh->dev_attr;
> +	dev_cnt = count_ocp2scp_devices(ocp2scp_dev);
> +
> +	if (!dev_cnt) {
> +		pr_err("%s: No devices connected to ocp2scp\n", __func__);
> +		return;

    Don't you leak 'pdata' here?

> +	}
> +
> +	pdata->devices = kzalloc(sizeof(struct omap_ocp2scp_dev *)
> +					* dev_cnt, GFP_KERNEL);
> +	if (!pdata->devices) {
> +		pr_err("%s: No memory for ocp2scp pdata devices\n", __func__);
> +		return;
> +	}
> +
> +	for (i = 0; i<  dev_cnt; i++, ocp2scp_dev++)
> +		pdata->devices[i] = ocp2scp_dev;
> +
> +	pdata->dev_cnt	= dev_cnt;
> +
> +	pdev = omap_device_build(name, bus_id, oh, pdata, sizeof(*pdata), NULL,
> +								0, false);
> +	if (IS_ERR(pdev)) {
> +		pr_err("Could not build omap_device for %s %s\n",
> +						name, oh_name);
> +		return;

    Don't you leak 'pdata' and 'pdata->devices' here?


> +	}
> +}
>

WBR,  Sergei

Re: [PATCH 3/3] ARM: OMAP: ocp2scp: create omap device for ocp2scp

[kishon]

Hi,

On Saturday 06 October 2012 04:00 AM, Sergei Shtylyov wrote:
> Hello.
>
> On 05-10-2012 12:07, Kishon Vijay Abraham I wrote:
>
>> Platfrom device for ocp2scp is created using omap_device_build in
>> devices file. This is used for both omap4(musb) and omap5(dwc3).
>>
>> Signed-off-by: Kishon Vijay Abraham I<kishon@ti.com>
>> ---
>>   arch/arm/mach-omap2/devices.c |   72
>> +++++++++++++++++++++++++++++++++++++++++
>>   1 file changed, 72 insertions(+)
>>
>> diff --git a/arch/arm/mach-omap2/devices.c
>> b/arch/arm/mach-omap2/devices.c
>> index c8c2117..e2ba505 100644
>> --- a/arch/arm/mach-omap2/devices.c
>> +++ b/arch/arm/mach-omap2/devices.c
> [...]
>> @@ -613,6 +614,76 @@ static void omap_init_vout(void)
> [...]
>
>> +static void omap_init_ocp2scp(void)
>> +{
>> +    struct omap_hwmod    *oh;
>> +    struct platform_device    *pdev;
>> +    int            bus_id = -1, dev_cnt = 0, i;
>> +    struct omap_ocp2scp_dev    *ocp2scp_dev;
>> +    const char        *oh_name, *name;
>> +    struct omap_ocp2scp_platform_data *pdata;
>> +
>> +    oh_name = "ocp2scp_usb_phy";
>> +    name    = "omap-ocp2scp";
>> +
>> +    oh = omap_hwmod_lookup(oh_name);
>> +    if (!oh) {
>> +        pr_err("%s: could not find omap_hwmod for %s\n", __func__,
>> +                                oh_name);
>> +        return;
>> +    }
>> +
>> +    pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
>> +    if (!pdata) {
>> +        pr_err("%s: No memory for ocp2scp pdata\n", __func__);
>> +        return;
>> +    }
>> +
>> +    ocp2scp_dev = oh->dev_attr;
>> +    dev_cnt = count_ocp2scp_devices(ocp2scp_dev);
>> +
>> +    if (!dev_cnt) {
>> +        pr_err("%s: No devices connected to ocp2scp\n", __func__);
>> +        return;
>
>     Don't you leak 'pdata' here?
>
>> +    }
>> +
>> +    pdata->devices = kzalloc(sizeof(struct omap_ocp2scp_dev *)
>> +                    * dev_cnt, GFP_KERNEL);
>> +    if (!pdata->devices) {
>> +        pr_err("%s: No memory for ocp2scp pdata devices\n", __func__);
>> +        return;
>> +    }
>> +
>> +    for (i = 0; i<  dev_cnt; i++, ocp2scp_dev++)
>> +        pdata->devices[i] = ocp2scp_dev;
>> +
>> +    pdata->dev_cnt    = dev_cnt;
>> +
>> +    pdev = omap_device_build(name, bus_id, oh, pdata, sizeof(*pdata),
>> NULL,
>> +                                0, false);
>> +    if (IS_ERR(pdev)) {
>> +        pr_err("Could not build omap_device for %s %s\n",
>> +                        name, oh_name);
>> +        return;
>
>     Don't you leak 'pdata' and 'pdata->devices' here?

Will re-post the patch fixing it.

Thanks
Kishon