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usb: gadget: Add UDC driver for Aeroflex Gaisler GRUSBDC 

This adds an UDC driver for GRUSBDC USB Device Controller cores available in the
GRLIB VHDL IP core library. The driver only supports DMA mode.

Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andreas Larsson 2013-12-23 21:25:49 +01:00 committed by Felipe Balbi
parent 7597fdfca9
commit 27e9dcc924
5 changed files with 2498 additions and 0 deletions
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28
Documentation/devicetree/bindings/usb/gr-udc.txt Normal file
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@ -0,0 +1,28 @@
USB Peripheral Controller driver for Aeroflex Gaisler GRUSBDC.
The GRUSBDC USB Device Controller core is available in the GRLIB VHDL
IP core library.
Note: In the ordinary environment for the core, a Leon SPARC system,
these properties are built from information in the AMBA plug&play.
Required properties:
- name : Should be "GAISLER_USBDC" or "01_021"
- reg : Address and length of the register set for the device
- interrupts : Interrupt numbers for this device
Optional properties:
- epobufsizes : An array of buffer sizes for OUT endpoints. If the property is
not present, or for endpoints outside of the array, 1024 is assumed by
the driver.
- epibufsizes : An array of buffer sizes for IN endpoints. If the property is
not present, or for endpoints outside of the array, 1024 is assumed by
the driver.
For further information look in the documentation for the GLIB IP core library:
http://www.gaisler.com/products/grlib/grip.pdf

7
drivers/usb/gadget/Kconfig
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@ -216,6 +216,13 @@ config USB_FOTG210_UDC
Say "y" to link the driver statically, or "m" to build a
dynamically linked module called "fotg210_udc".
config USB_GR_UDC
tristate "Aeroflex Gaisler GRUSBDC USB Peripheral Controller Driver"
depends on HAS_DMA
help
Select this to support Aeroflex Gaisler GRUSBDC cores from the GRLIB
VHDL IP core library.
config USB_OMAP
tristate "OMAP USB Device Controller"
depends on ARCH_OMAP1

1
drivers/usb/gadget/Makefile
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@ -35,6 +35,7 @@ mv_udc-y := mv_udc_core.o
obj-$(CONFIG_USB_FUSB300) += fusb300_udc.o
obj-$(CONFIG_USB_FOTG210_UDC) += fotg210-udc.o
obj-$(CONFIG_USB_MV_U3D) += mv_u3d_core.o
obj-$(CONFIG_USB_GR_UDC) += gr_udc.o
# USB Functions
usb_f_acm-y := f_acm.o

2242
drivers/usb/gadget/gr_udc.c Normal file
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220
drivers/usb/gadget/gr_udc.h Normal file
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/*
* USB Peripheral Controller driver for Aeroflex Gaisler GRUSBDC.
*
* 2013 (c) Aeroflex Gaisler AB
*
* This driver supports GRUSBDC USB Device Controller cores available in the
* GRLIB VHDL IP core library.
*
* Full documentation of the GRUSBDC core can be found here:
* http://www.gaisler.com/products/grlib/grip.pdf
*
* 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.
*
* Contributors:
* - Andreas Larsson <andreas@gaisler.com>
* - Marko Isomaki
*/
/* Control registers on the AMBA bus */
#define GR_MAXEP 16 /* Max # endpoints for *each* direction */
struct gr_epregs {
u32 epctrl;
union {
struct { /* Slave mode*/
u32 slvctrl;
u32 slvdata;
};
struct { /* DMA mode*/
u32 dmactrl;
u32 dmaaddr;
};
};
u32 epstat;
};
struct gr_regs {
struct gr_epregs epo[GR_MAXEP]; /* 0x000 - 0x0fc */
struct gr_epregs epi[GR_MAXEP]; /* 0x100 - 0x1fc */
u32 control; /* 0x200 */
u32 status; /* 0x204 */
};
#define GR_EPCTRL_BUFSZ_SCALER 8
#define GR_EPCTRL_BUFSZ_MASK 0xffe00000
#define GR_EPCTRL_BUFSZ_POS 21
#define GR_EPCTRL_PI BIT(20)
#define GR_EPCTRL_CB BIT(19)
#define GR_EPCTRL_CS BIT(18)
#define GR_EPCTRL_MAXPL_MASK 0x0003ff80
#define GR_EPCTRL_MAXPL_POS 7
#define GR_EPCTRL_NT_MASK 0x00000060
#define GR_EPCTRL_NT_POS 5
#define GR_EPCTRL_TT_MASK 0x00000018
#define GR_EPCTRL_TT_POS 3
#define GR_EPCTRL_EH BIT(2)
#define GR_EPCTRL_ED BIT(1)
#define GR_EPCTRL_EV BIT(0)
#define GR_DMACTRL_AE BIT(10)
#define GR_DMACTRL_AD BIT(3)
#define GR_DMACTRL_AI BIT(2)
#define GR_DMACTRL_IE BIT(1)
#define GR_DMACTRL_DA BIT(0)
#define GR_EPSTAT_PT BIT(29)
#define GR_EPSTAT_PR BIT(29)
#define GR_EPSTAT_B1CNT_MASK 0x1fff0000
#define GR_EPSTAT_B1CNT_POS 16
#define GR_EPSTAT_B0CNT_MASK 0x0000fff8
#define GR_EPSTAT_B0CNT_POS 3
#define GR_EPSTAT_B1 BIT(2)
#define GR_EPSTAT_B0 BIT(1)
#define GR_EPSTAT_BS BIT(0)
#define GR_CONTROL_SI BIT(31)
#define GR_CONTROL_UI BIT(30)
#define GR_CONTROL_VI BIT(29)
#define GR_CONTROL_SP BIT(28)
#define GR_CONTROL_FI BIT(27)
#define GR_CONTROL_EP BIT(14)
#define GR_CONTROL_DH BIT(13)
#define GR_CONTROL_RW BIT(12)
#define GR_CONTROL_TS_MASK 0x00000e00
#define GR_CONTROL_TS_POS 9
#define GR_CONTROL_TM BIT(8)
#define GR_CONTROL_UA_MASK 0x000000fe
#define GR_CONTROL_UA_POS 1
#define GR_CONTROL_SU BIT(0)
#define GR_STATUS_NEPI_MASK 0xf0000000
#define GR_STATUS_NEPI_POS 28
#define GR_STATUS_NEPO_MASK 0x0f000000
#define GR_STATUS_NEPO_POS 24
#define GR_STATUS_DM BIT(23)
#define GR_STATUS_SU BIT(17)
#define GR_STATUS_UR BIT(16)
#define GR_STATUS_VB BIT(15)
#define GR_STATUS_SP BIT(14)
#define GR_STATUS_AF_MASK 0x00003800
#define GR_STATUS_AF_POS 11
#define GR_STATUS_FN_MASK 0x000007ff
#define GR_STATUS_FN_POS 0
#define MAX_CTRL_PL_SIZE 64 /* As per USB standard for full and high speed */
/*-------------------------------------------------------------------------*/
/* Driver data structures and utilities */
struct gr_dma_desc {
u32 ctrl;
u32 data;
u32 next;
/* These must be last because hw uses the previous three */
u32 paddr;
struct gr_dma_desc *next_desc;
};
#define GR_DESC_OUT_CTRL_SE BIT(17)
#define GR_DESC_OUT_CTRL_IE BIT(15)
#define GR_DESC_OUT_CTRL_NX BIT(14)
#define GR_DESC_OUT_CTRL_EN BIT(13)
#define GR_DESC_OUT_CTRL_LEN_MASK 0x00001fff
#define GR_DESC_IN_CTRL_MO BIT(18)
#define GR_DESC_IN_CTRL_PI BIT(17)
#define GR_DESC_IN_CTRL_ML BIT(16)
#define GR_DESC_IN_CTRL_IE BIT(15)
#define GR_DESC_IN_CTRL_NX BIT(14)
#define GR_DESC_IN_CTRL_EN BIT(13)
#define GR_DESC_IN_CTRL_LEN_MASK 0x00001fff
#define GR_DESC_DMAADDR_MASK 0xfffffffc
struct gr_ep {
struct usb_ep ep;
struct gr_udc *dev;
u16 bytes_per_buffer;
unsigned int dma_start;
struct gr_epregs __iomem *regs;
unsigned num:8;
unsigned is_in:1;
unsigned stopped:1;
unsigned wedged:1;
unsigned callback:1;
/* analogous to a host-side qh */
struct list_head queue;
struct list_head ep_list;
};
struct gr_request {
struct usb_request req;
struct list_head queue;
/* Chain of dma descriptors */
struct gr_dma_desc *first_desc; /* First in the chain */
struct gr_dma_desc *curr_desc; /* Current descriptor */
struct gr_dma_desc *last_desc; /* Last in the chain */
u8 setup; /* Setup packet */
};
enum gr_ep0state {
GR_EP0_DISCONNECT = 0, /* No host */
GR_EP0_SETUP, /* Between STATUS ack and SETUP report */
GR_EP0_IDATA, /* IN data stage */
GR_EP0_ODATA, /* OUT data stage */
GR_EP0_ISTATUS, /* Status stage after IN data stage */
GR_EP0_OSTATUS, /* Status stage after OUT data stage */
GR_EP0_STALL, /* Data or status stages */
GR_EP0_SUSPEND, /* USB suspend */
};
struct gr_udc {
struct usb_gadget gadget;
struct gr_ep epi[GR_MAXEP];
struct gr_ep epo[GR_MAXEP];
struct usb_gadget_driver *driver;
struct dma_pool *desc_pool;
struct device *dev;
enum gr_ep0state ep0state;
struct gr_request *ep0reqo;
struct gr_request *ep0reqi;
struct gr_regs __iomem *regs;
int irq;
int irqi;
int irqo;
unsigned added:1;
unsigned irq_enabled:1;
unsigned remote_wakeup:1;
u8 test_mode;
enum usb_device_state suspended_from;
unsigned int nepi;
unsigned int nepo;
struct list_head ep_list;
spinlock_t lock; /* General lock, a.k.a. "dev->lock" in comments */
struct dentry *dfs_root;
struct dentry *dfs_state;
};
#define to_gr_udc(gadget) (container_of((gadget), struct gr_udc, gadget))