649 lines
14 KiB
C
649 lines
14 KiB
C
/*
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* Renesas USB driver
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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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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/pm_runtime.h>
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#include <linux/slab.h>
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#include <linux/sysfs.h>
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#include "common.h"
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/*
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* image of renesas_usbhs
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*
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* ex) gadget case
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* mod.c
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* mod_gadget.c
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* mod_host.c pipe.c fifo.c
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*
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* +-------+ +-----------+
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* | pipe0 |------>| fifo pio |
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* +------------+ +-------+ +-----------+
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* | mod_gadget |=====> | pipe1 |--+
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* +------------+ +-------+ | +-----------+
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* | pipe2 | | +-| fifo dma0 |
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* +------------+ +-------+ | | +-----------+
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* | mod_host | | pipe3 |<-|--+
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* +------------+ +-------+ | +-----------+
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* | .... | +--->| fifo dma1 |
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* | .... | +-----------+
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*/
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#define USBHSF_RUNTIME_PWCTRL (1 << 0)
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/* status */
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#define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0)
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#define usbhsc_flags_set(p, b) ((p)->flags |= (b))
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#define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
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#define usbhsc_flags_has(p, b) ((p)->flags & (b))
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/*
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* platform call back
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*
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* renesas usb support platform callback function.
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* Below macro call it.
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* if platform doesn't have callback, it return 0 (no error)
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*/
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#define usbhs_platform_call(priv, func, args...)\
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(!(priv) ? -ENODEV : \
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!((priv)->pfunc.func) ? 0 : \
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(priv)->pfunc.func(args))
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/*
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* common functions
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*/
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u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
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{
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return ioread16(priv->base + reg);
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}
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void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
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{
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iowrite16(data, priv->base + reg);
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}
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void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
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{
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u16 val = usbhs_read(priv, reg);
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val &= ~mask;
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val |= data & mask;
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usbhs_write(priv, reg, val);
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}
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struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
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{
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return dev_get_drvdata(&pdev->dev);
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}
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/*
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* syscfg functions
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*/
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static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
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{
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usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
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}
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void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
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{
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u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
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u16 val = DCFM | DRPD | HSE | USBE;
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int has_otg = usbhs_get_dparam(priv, has_otg);
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if (has_otg)
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usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
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/*
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* if enable
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*
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* - select Host mode
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* - D+ Line/D- Line Pull-down
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*/
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usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
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}
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void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
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{
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u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
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u16 val = DPRPU | HSE | USBE;
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/*
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* if enable
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*
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* - select Function mode
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* - D+ Line Pull-up
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*/
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usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
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}
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void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
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{
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usbhs_write(priv, TESTMODE, mode);
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}
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/*
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* frame functions
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*/
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int usbhs_frame_get_num(struct usbhs_priv *priv)
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{
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return usbhs_read(priv, FRMNUM) & FRNM_MASK;
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}
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/*
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* usb request functions
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*/
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void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
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{
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u16 val;
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val = usbhs_read(priv, USBREQ);
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req->bRequest = (val >> 8) & 0xFF;
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req->bRequestType = (val >> 0) & 0xFF;
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req->wValue = usbhs_read(priv, USBVAL);
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req->wIndex = usbhs_read(priv, USBINDX);
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req->wLength = usbhs_read(priv, USBLENG);
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}
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void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
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{
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usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
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usbhs_write(priv, USBVAL, req->wValue);
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usbhs_write(priv, USBINDX, req->wIndex);
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usbhs_write(priv, USBLENG, req->wLength);
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usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
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}
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/*
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* bus/vbus functions
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*/
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void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
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{
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u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
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if (status != USBRST) {
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struct device *dev = usbhs_priv_to_dev(priv);
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dev_err(dev, "usbhs should be reset\n");
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}
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usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
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}
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void usbhs_bus_send_reset(struct usbhs_priv *priv)
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{
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usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
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}
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int usbhs_bus_get_speed(struct usbhs_priv *priv)
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{
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u16 dvstctr = usbhs_read(priv, DVSTCTR);
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switch (RHST & dvstctr) {
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case RHST_LOW_SPEED:
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return USB_SPEED_LOW;
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case RHST_FULL_SPEED:
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return USB_SPEED_FULL;
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case RHST_HIGH_SPEED:
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return USB_SPEED_HIGH;
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}
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return USB_SPEED_UNKNOWN;
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}
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int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
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{
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struct platform_device *pdev = usbhs_priv_to_pdev(priv);
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return usbhs_platform_call(priv, set_vbus, pdev, enable);
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}
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static void usbhsc_bus_init(struct usbhs_priv *priv)
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{
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usbhs_write(priv, DVSTCTR, 0);
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usbhs_vbus_ctrl(priv, 0);
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}
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/*
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* device configuration
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*/
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int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
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u16 upphub, u16 hubport, u16 speed)
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{
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struct device *dev = usbhs_priv_to_dev(priv);
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u16 usbspd = 0;
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u32 reg = DEVADD0 + (2 * devnum);
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if (devnum > 10) {
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dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
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return -EIO;
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}
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if (upphub > 0xA) {
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dev_err(dev, "unsupported hub number %d\n", upphub);
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return -EIO;
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}
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switch (speed) {
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case USB_SPEED_LOW:
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usbspd = USBSPD_SPEED_LOW;
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break;
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case USB_SPEED_FULL:
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usbspd = USBSPD_SPEED_FULL;
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break;
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case USB_SPEED_HIGH:
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usbspd = USBSPD_SPEED_HIGH;
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break;
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default:
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dev_err(dev, "unsupported speed %d\n", speed);
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return -EIO;
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}
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usbhs_write(priv, reg, UPPHUB(upphub) |
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HUBPORT(hubport)|
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USBSPD(usbspd));
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return 0;
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}
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/*
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* local functions
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*/
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static void usbhsc_set_buswait(struct usbhs_priv *priv)
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{
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int wait = usbhs_get_dparam(priv, buswait_bwait);
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/* set bus wait if platform have */
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if (wait)
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usbhs_bset(priv, BUSWAIT, 0x000F, wait);
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}
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/*
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* platform default param
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*/
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static u32 usbhsc_default_pipe_type[] = {
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USB_ENDPOINT_XFER_CONTROL,
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USB_ENDPOINT_XFER_ISOC,
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USB_ENDPOINT_XFER_ISOC,
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USB_ENDPOINT_XFER_BULK,
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USB_ENDPOINT_XFER_BULK,
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USB_ENDPOINT_XFER_BULK,
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USB_ENDPOINT_XFER_INT,
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USB_ENDPOINT_XFER_INT,
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USB_ENDPOINT_XFER_INT,
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USB_ENDPOINT_XFER_INT,
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};
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/*
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* power control
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*/
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static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
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{
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struct platform_device *pdev = usbhs_priv_to_pdev(priv);
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struct device *dev = usbhs_priv_to_dev(priv);
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if (enable) {
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/* enable PM */
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pm_runtime_get_sync(dev);
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/* enable platform power */
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usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
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/* USB on */
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usbhs_sys_clock_ctrl(priv, enable);
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} else {
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/* USB off */
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usbhs_sys_clock_ctrl(priv, enable);
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/* disable platform power */
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usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
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/* disable PM */
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pm_runtime_put_sync(dev);
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}
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}
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/*
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* hotplug
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*/
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static void usbhsc_hotplug(struct usbhs_priv *priv)
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{
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struct platform_device *pdev = usbhs_priv_to_pdev(priv);
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struct usbhs_mod *mod = usbhs_mod_get_current(priv);
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int id;
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int enable;
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int ret;
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/*
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* get vbus status from platform
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*/
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enable = usbhs_platform_call(priv, get_vbus, pdev);
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/*
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* get id from platform
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*/
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id = usbhs_platform_call(priv, get_id, pdev);
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if (enable && !mod) {
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ret = usbhs_mod_change(priv, id);
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if (ret < 0)
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return;
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dev_dbg(&pdev->dev, "%s enable\n", __func__);
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/* power on */
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if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
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usbhsc_power_ctrl(priv, enable);
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/* bus init */
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usbhsc_set_buswait(priv);
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usbhsc_bus_init(priv);
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/* module start */
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usbhs_mod_call(priv, start, priv);
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} else if (!enable && mod) {
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dev_dbg(&pdev->dev, "%s disable\n", __func__);
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/* module stop */
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usbhs_mod_call(priv, stop, priv);
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/* bus init */
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usbhsc_bus_init(priv);
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/* power off */
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if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
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usbhsc_power_ctrl(priv, enable);
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usbhs_mod_change(priv, -1);
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/* reset phy for next connection */
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usbhs_platform_call(priv, phy_reset, pdev);
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}
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}
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/*
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* notify hotplug
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*/
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static void usbhsc_notify_hotplug(struct work_struct *work)
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{
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struct usbhs_priv *priv = container_of(work,
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struct usbhs_priv,
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notify_hotplug_work.work);
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usbhsc_hotplug(priv);
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}
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static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
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{
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struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
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int delay = usbhs_get_dparam(priv, detection_delay);
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/*
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* This functions will be called in interrupt.
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* To make sure safety context,
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* use workqueue for usbhs_notify_hotplug
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*/
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schedule_delayed_work(&priv->notify_hotplug_work,
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msecs_to_jiffies(delay));
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return 0;
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}
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/*
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* platform functions
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*/
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static int usbhs_probe(struct platform_device *pdev)
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{
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struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
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struct renesas_usbhs_driver_callback *dfunc;
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struct usbhs_priv *priv;
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struct resource *res, *irq_res;
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int ret;
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/* check platform information */
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if (!info ||
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!info->platform_callback.get_id) {
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dev_err(&pdev->dev, "no platform information\n");
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return -EINVAL;
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}
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/* platform data */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (!res || !irq_res) {
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dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
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return -ENODEV;
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}
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/* usb private data */
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv) {
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dev_err(&pdev->dev, "Could not allocate priv\n");
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return -ENOMEM;
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}
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priv->base = ioremap_nocache(res->start, resource_size(res));
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if (!priv->base) {
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dev_err(&pdev->dev, "ioremap error.\n");
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ret = -ENOMEM;
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goto probe_end_kfree;
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}
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/*
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* care platform info
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*/
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memcpy(&priv->pfunc,
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&info->platform_callback,
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sizeof(struct renesas_usbhs_platform_callback));
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memcpy(&priv->dparam,
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&info->driver_param,
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sizeof(struct renesas_usbhs_driver_param));
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/* set driver callback functions for platform */
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dfunc = &info->driver_callback;
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dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
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/* set default param if platform doesn't have */
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if (!priv->dparam.pipe_type) {
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priv->dparam.pipe_type = usbhsc_default_pipe_type;
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priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
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}
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if (!priv->dparam.pio_dma_border)
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priv->dparam.pio_dma_border = 64; /* 64byte */
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/* FIXME */
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/* runtime power control ? */
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if (priv->pfunc.get_vbus)
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usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
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/*
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* priv settings
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*/
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priv->irq = irq_res->start;
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if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
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priv->irqflags = IRQF_SHARED;
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priv->pdev = pdev;
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INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
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spin_lock_init(usbhs_priv_to_lock(priv));
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/* call pipe and module init */
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ret = usbhs_pipe_probe(priv);
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if (ret < 0)
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goto probe_end_iounmap;
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ret = usbhs_fifo_probe(priv);
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if (ret < 0)
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goto probe_end_pipe_exit;
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ret = usbhs_mod_probe(priv);
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if (ret < 0)
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goto probe_end_fifo_exit;
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/* dev_set_drvdata should be called after usbhs_mod_init */
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dev_set_drvdata(&pdev->dev, priv);
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/*
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* deviece reset here because
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* USB device might be used in boot loader.
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*/
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usbhs_sys_clock_ctrl(priv, 0);
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/*
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* platform call
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*
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* USB phy setup might depend on CPU/Board.
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* If platform has its callback functions,
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* call it here.
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*/
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ret = usbhs_platform_call(priv, hardware_init, pdev);
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if (ret < 0) {
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dev_err(&pdev->dev, "platform prove failed.\n");
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goto probe_end_mod_exit;
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}
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/* reset phy for connection */
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usbhs_platform_call(priv, phy_reset, pdev);
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/* power control */
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pm_runtime_enable(&pdev->dev);
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if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
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usbhsc_power_ctrl(priv, 1);
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usbhs_mod_autonomy_mode(priv);
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}
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/*
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* manual call notify_hotplug for cold plug
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*/
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ret = usbhsc_drvcllbck_notify_hotplug(pdev);
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if (ret < 0)
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goto probe_end_call_remove;
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dev_info(&pdev->dev, "probed\n");
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return ret;
|
|
|
|
probe_end_call_remove:
|
|
usbhs_platform_call(priv, hardware_exit, pdev);
|
|
probe_end_mod_exit:
|
|
usbhs_mod_remove(priv);
|
|
probe_end_fifo_exit:
|
|
usbhs_fifo_remove(priv);
|
|
probe_end_pipe_exit:
|
|
usbhs_pipe_remove(priv);
|
|
probe_end_iounmap:
|
|
iounmap(priv->base);
|
|
probe_end_kfree:
|
|
kfree(priv);
|
|
|
|
dev_info(&pdev->dev, "probe failed\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit usbhs_remove(struct platform_device *pdev)
|
|
{
|
|
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
|
|
struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
|
|
struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
|
|
|
|
dev_dbg(&pdev->dev, "usb remove\n");
|
|
|
|
dfunc->notify_hotplug = NULL;
|
|
|
|
/* power off */
|
|
if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
|
|
usbhsc_power_ctrl(priv, 0);
|
|
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
usbhs_platform_call(priv, hardware_exit, pdev);
|
|
usbhs_mod_remove(priv);
|
|
usbhs_fifo_remove(priv);
|
|
usbhs_pipe_remove(priv);
|
|
iounmap(priv->base);
|
|
kfree(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usbhsc_suspend(struct device *dev)
|
|
{
|
|
struct usbhs_priv *priv = dev_get_drvdata(dev);
|
|
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
|
|
|
|
if (mod) {
|
|
usbhs_mod_call(priv, stop, priv);
|
|
usbhs_mod_change(priv, -1);
|
|
}
|
|
|
|
if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
|
|
usbhsc_power_ctrl(priv, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usbhsc_resume(struct device *dev)
|
|
{
|
|
struct usbhs_priv *priv = dev_get_drvdata(dev);
|
|
struct platform_device *pdev = usbhs_priv_to_pdev(priv);
|
|
|
|
if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
|
|
usbhsc_power_ctrl(priv, 1);
|
|
|
|
usbhs_platform_call(priv, phy_reset, pdev);
|
|
|
|
usbhsc_drvcllbck_notify_hotplug(pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usbhsc_runtime_nop(struct device *dev)
|
|
{
|
|
/* Runtime PM callback shared between ->runtime_suspend()
|
|
* and ->runtime_resume(). Simply returns success.
|
|
*
|
|
* This driver re-initializes all registers after
|
|
* pm_runtime_get_sync() anyway so there is no need
|
|
* to save and restore registers here.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops usbhsc_pm_ops = {
|
|
.suspend = usbhsc_suspend,
|
|
.resume = usbhsc_resume,
|
|
.runtime_suspend = usbhsc_runtime_nop,
|
|
.runtime_resume = usbhsc_runtime_nop,
|
|
};
|
|
|
|
static struct platform_driver renesas_usbhs_driver = {
|
|
.driver = {
|
|
.name = "renesas_usbhs",
|
|
.pm = &usbhsc_pm_ops,
|
|
},
|
|
.probe = usbhs_probe,
|
|
.remove = __devexit_p(usbhs_remove),
|
|
};
|
|
|
|
module_platform_driver(renesas_usbhs_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Renesas USB driver");
|
|
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
|