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Date: Tue, 23 Jun 2009 14:39:54 +0100
From: Ben Dooks <ben-linux@...ff.org>
To: Mike Frysinger <vapier@...too.org>
Cc: gregkh@...e.de, bigeasy@...uxtronix.de,
linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
Michael Hennerich <michael.hennerich@...log.com>,
Bryan Wu <cooloney@...nel.org>
Subject: Re: [PATCH] USB: isp1760: allow platform devices to customize
devflags
On Tue, Jun 23, 2009 at 09:18:34AM -0400, Mike Frysinger wrote:
> From: Michael Hennerich <michael.hennerich@...log.com>
>
> Platform device support was merged earlier, but support for boards to
> customize the devflags aspect of the controller was not. We want this on
> Blackfin systems to control the bus width, but might as well expose all of
> the fields while we're at it.
>
> Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
> Signed-off-by: Bryan Wu <cooloney@...nel.org>
> Signed-off-by: Mike Frysinger <vapier@...too.org>
> ---
> drivers/usb/host/isp1760-hcd.c | 4 ++++
> drivers/usb/host/isp1760-hcd.h | 2 ++
> drivers/usb/host/isp1760-if.c | 21 ++++++++++++++++++++-
> include/linux/usb/isp1760.h | 18 ++++++++++++++++++
> 4 files changed, 44 insertions(+), 1 deletions(-)
> create mode 100644 include/linux/usb/isp1760.h
>
> diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c
> index 1543846..9600a58 100644
> --- a/drivers/usb/host/isp1760-hcd.c
> +++ b/drivers/usb/host/isp1760-hcd.c
> @@ -386,6 +386,10 @@ static int isp1760_hc_setup(struct usb_hcd *hcd)
> hwmode |= HW_DACK_POL_HIGH;
> if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
> hwmode |= HW_DREQ_POL_HIGH;
> + if (priv->devflags & ISP1760_FLAG_INTR_POL_HIGH)
> + hwmode |= HW_INTR_HIGH_ACT;
> + if (priv->devflags & ISP1760_FLAG_INTR_EDGE_TRIG)
> + hwmode |= HW_INTR_EDGE_TRIG;
better move these to the irq resource flags from the resource array
in the platfrom device.
> /*
> * We have to set this first in case we're in 16-bit mode.
> diff --git a/drivers/usb/host/isp1760-hcd.h b/drivers/usb/host/isp1760-hcd.h
> index 462f494..6931ef5 100644
> --- a/drivers/usb/host/isp1760-hcd.h
> +++ b/drivers/usb/host/isp1760-hcd.h
> @@ -142,6 +142,8 @@ typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh,
> #define ISP1760_FLAG_DACK_POL_HIGH 0x00000010 /* DACK active high */
> #define ISP1760_FLAG_DREQ_POL_HIGH 0x00000020 /* DREQ active high */
> #define ISP1760_FLAG_ISP1761 0x00000040 /* Chip is ISP1761 */
> +#define ISP1760_FLAG_INTR_POL_HIGH 0x00000080 /* Interrupt polarity active high */
> +#define ISP1760_FLAG_INTR_EDGE_TRIG 0x00000100 /* Interrupt edge triggered */
>
> /* chip memory management */
> struct memory_chunk {
> diff --git a/drivers/usb/host/isp1760-if.c b/drivers/usb/host/isp1760-if.c
> index d4feebf..1c9f977 100644
> --- a/drivers/usb/host/isp1760-if.c
> +++ b/drivers/usb/host/isp1760-if.c
> @@ -3,6 +3,7 @@
> * Currently there is support for
> * - OpenFirmware
> * - PCI
> + * - PDEV (generic platform device centralized driver model)
> *
> * (c) 2007 Sebastian Siewior <bigeasy@...utronix.de>
> *
> @@ -11,6 +12,7 @@
> #include <linux/usb.h>
> #include <linux/io.h>
> #include <linux/platform_device.h>
> +#include <linux/usb/isp1760.h>
>
> #include "../core/hcd.h"
> #include "isp1760-hcd.h"
> @@ -308,6 +310,8 @@ static int __devinit isp1760_plat_probe(struct platform_device *pdev)
> struct resource *mem_res;
> struct resource *irq_res;
> resource_size_t mem_size;
> + struct isp1760_platform_data *priv = pdev->dev.platform_data;
> + unsigned int devflags = 0;
> unsigned long irqflags = IRQF_SHARED | IRQF_DISABLED;
>
> mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> @@ -330,8 +334,23 @@ static int __devinit isp1760_plat_probe(struct platform_device *pdev)
> }
> irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
>
> + if (priv) {
> + if (priv->is_isp1761)
> + devflags |= ISP1760_FLAG_ISP1761;
> + if (priv->bus_width_16)
> + devflags |= ISP1760_FLAG_BUS_WIDTH_16;
> + if (priv->port1_otg)
> + devflags |= ISP1760_FLAG_OTG_EN;
> + if (priv->analog_oc)
> + devflags |= ISP1760_FLAG_ANALOG_OC;
> + if (priv->dack_polarity_high)
> + devflags |= ISP1760_FLAG_DACK_POL_HIGH;
> + if (priv->dreq_polarity_high)
> + devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
> + }
> +
> hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
> - irqflags, &pdev->dev, dev_name(&pdev->dev), 0);
> + irqflags, &pdev->dev, dev_name(&pdev->dev), devflags);
> if (IS_ERR(hcd)) {
> pr_warning("isp1760: Failed to register the HCD device\n");
> ret = -ENODEV;
> diff --git a/include/linux/usb/isp1760.h b/include/linux/usb/isp1760.h
> new file mode 100644
> index 0000000..de7de53
> --- /dev/null
> +++ b/include/linux/usb/isp1760.h
> @@ -0,0 +1,18 @@
> +/*
> + * board initialization should put one of these into dev->platform_data
> + * and place the isp1760 onto platform_bus named "isp1760-hcd".
> + */
> +
> +#ifndef __LINUX_USB_ISP1760_H
> +#define __LINUX_USB_ISP1760_H
> +
> +struct isp1760_platform_data {
> + unsigned is_isp1761:1; /* Chip is ISP1761 */
> + unsigned bus_width_16:1; /* 16/32-bit data bus width */
> + unsigned port1_otg:1; /* Port 1 supports OTG */
> + unsigned analog_oc:1; /* Analog overcurrent */
> + unsigned dack_polarity_high:1; /* DACK active high */
> + unsigned dreq_polarity_high:1; /* DREQ active high */
> +};
> +
> +#endif /* __LINUX_USB_ISP1760_H */
> --
> 1.6.3.1
>
> --
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--
Ben (ben@...ff.org, http://www.fluff.org/)
'a smiley only costs 4 bytes'
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