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e73a9891b3
USB DMA was installed on "normal DMAC" when SH7724 or older SuperH, but the "USB-DMAC" was prepared on recent SuperH. These 2 DMAC have a little bit different behavior. This patch add DMAEngine code for "normal DMAC", but it is still using PIO fifo. The DMA fifo will be formally supported in the future. You can enable DMA fifo by local fixup usbhs_fifo_pio_push_handler -> usbhs_fifo_dma_push_handler usbhs_fifo_pio_pop_handler -> usbhs_fifo_dma_pop_handler on usbhsg_ep_enable. This DMAEngine was tested by g_file_storage on SH7724 Ecovec board Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
173 lines
3.5 KiB
C
173 lines
3.5 KiB
C
/*
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* Renesas USB
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef RENESAS_USB_H
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#define RENESAS_USB_H
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#include <linux/platform_device.h>
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#include <linux/usb/ch9.h>
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/*
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* module type
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*
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* it will be return value from get_id
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*/
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enum {
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USBHS_HOST = 0,
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USBHS_GADGET,
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USBHS_MAX,
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};
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/*
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* callback functions table for driver
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*
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* These functions are called from platform for driver.
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* Callback function's pointer will be set before
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* renesas_usbhs_platform_callback :: hardware_init was called
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*/
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struct renesas_usbhs_driver_callback {
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int (*notify_hotplug)(struct platform_device *pdev);
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};
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/*
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* callback functions for platform
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*
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* These functions are called from driver for platform
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*/
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struct renesas_usbhs_platform_callback {
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/*
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* option:
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*
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* Hardware init function for platform.
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* it is called when driver was probed.
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*/
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int (*hardware_init)(struct platform_device *pdev);
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/*
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* option:
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*
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* Hardware exit function for platform.
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* it is called when driver was removed
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*/
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void (*hardware_exit)(struct platform_device *pdev);
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/*
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* option:
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*
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* Phy reset for platform
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*/
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void (*phy_reset)(struct platform_device *pdev);
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/*
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* get USB ID function
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* - USBHS_HOST
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* - USBHS_GADGET
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*/
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int (*get_id)(struct platform_device *pdev);
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/*
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* get VBUS status function.
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*/
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int (*get_vbus)(struct platform_device *pdev);
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};
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/*
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* parameters for renesas usbhs
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*
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* some register needs USB chip specific parameters.
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* This struct show it to driver
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*/
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struct renesas_usbhs_driver_param {
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/*
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* pipe settings
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*/
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u32 *pipe_type; /* array of USB_ENDPOINT_XFER_xxx (from ep0) */
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int pipe_size; /* pipe_type array size */
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/*
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* option:
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*
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* for BUSWAIT :: BWAIT
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* */
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int buswait_bwait;
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/*
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* option:
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*
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* delay time from notify_hotplug callback
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*/
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int detection_delay;
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/*
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* option:
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*
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* dma id for dmaengine
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*/
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int d0_tx_id;
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int d0_rx_id;
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int d1_tx_id;
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int d1_rx_id;
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/*
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* option:
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*
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* pio <--> dma border.
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*/
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int pio_dma_border; /* default is 64byte */
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};
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/*
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* option:
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*
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* platform information for renesas_usbhs driver.
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*/
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struct renesas_usbhs_platform_info {
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/*
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* option:
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*
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* platform set these functions before
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* call platform_add_devices if needed
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*/
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struct renesas_usbhs_platform_callback platform_callback;
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/*
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* driver set these callback functions pointer.
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* platform can use it on callback functions
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*/
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struct renesas_usbhs_driver_callback driver_callback;
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/*
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* option:
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*
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* driver use these param for some register
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*/
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struct renesas_usbhs_driver_param driver_param;
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};
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/*
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* macro for platform
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*/
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#define renesas_usbhs_get_info(pdev)\
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((struct renesas_usbhs_platform_info *)(pdev)->dev.platform_data)
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#define renesas_usbhs_call_notify_hotplug(pdev) \
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({ \
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struct renesas_usbhs_driver_callback *dc; \
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dc = &(renesas_usbhs_get_info(pdev)->driver_callback); \
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if (dc && dc->notify_hotplug) \
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dc->notify_hotplug(pdev); \
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})
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#endif /* RENESAS_USB_H */
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