2 * platform.c - DesignWare HS OTG Controller platform driver
4 * Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions, and the following disclaimer,
11 * without modification.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The names of the above-listed copyright holders may not be used
16 * to endorse or promote products derived from this software without
17 * specific prior written permission.
19 * ALTERNATIVELY, this software may be distributed under the terms of the
20 * GNU General Public License ("GPL") as published by the Free Software
21 * Foundation; either version 2 of the License, or (at your option) any
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
25 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
26 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
28 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
31 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
33 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
34 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/slab.h>
40 #include <linux/device.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/of_device.h>
43 #include <linux/mutex.h>
44 #include <linux/platform_device.h>
46 #include <linux/usb/of.h>
51 static const char dwc2_driver_name
[] = "dwc2";
53 static const struct dwc2_core_params params_bcm2835
= {
54 .otg_cap
= 0, /* HNP/SRP capable */
55 .otg_ver
= 0, /* 1.3 */
58 .speed
= 0, /* High Speed */
59 .enable_dynamic_fifo
= 1,
60 .en_multiple_tx_fifo
= 1,
61 .host_rx_fifo_size
= 774, /* 774 DWORDs */
62 .host_nperio_tx_fifo_size
= 256, /* 256 DWORDs */
63 .host_perio_tx_fifo_size
= 512, /* 512 DWORDs */
64 .max_transfer_size
= 65535,
65 .max_packet_count
= 511,
67 .phy_type
= 1, /* UTMI */
68 .phy_utmi_width
= 8, /* 8 bits */
69 .phy_ulpi_ddr
= 0, /* Single */
70 .phy_ulpi_ext_vbus
= 0,
73 .host_support_fs_ls_low_power
= 0,
74 .host_ls_low_power_phy_clk
= 0, /* 48 MHz */
81 static const struct dwc2_core_params params_rk3066
= {
82 .otg_cap
= 2, /* non-HNP/non-SRP */
87 .enable_dynamic_fifo
= 1,
88 .en_multiple_tx_fifo
= -1,
89 .host_rx_fifo_size
= 520, /* 520 DWORDs */
90 .host_nperio_tx_fifo_size
= 128, /* 128 DWORDs */
91 .host_perio_tx_fifo_size
= 256, /* 256 DWORDs */
92 .max_transfer_size
= 65535,
93 .max_packet_count
= -1,
98 .phy_ulpi_ext_vbus
= -1,
101 .host_support_fs_ls_low_power
= -1,
102 .host_ls_low_power_phy_clk
= -1,
105 .ahbcfg
= 0x7, /* INCR16 */
110 * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
113 * @dev: Platform device
115 * This routine is called, for example, when the rmmod command is executed. The
116 * device may or may not be electrically present. If it is present, the driver
117 * stops device processing. Any resources used on behalf of this device are
120 static int dwc2_driver_remove(struct platform_device
*dev
)
122 struct dwc2_hsotg
*hsotg
= platform_get_drvdata(dev
);
124 dwc2_hcd_remove(hsotg
);
125 s3c_hsotg_remove(hsotg
);
130 static const struct of_device_id dwc2_of_match_table
[] = {
131 { .compatible
= "brcm,bcm2835-usb", .data
= ¶ms_bcm2835
},
132 { .compatible
= "rockchip,rk3066-usb", .data
= ¶ms_rk3066
},
133 { .compatible
= "snps,dwc2", .data
= NULL
},
134 { .compatible
= "samsung,s3c6400-hsotg", .data
= NULL
},
137 MODULE_DEVICE_TABLE(of
, dwc2_of_match_table
);
140 * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
143 * @dev: Platform device
145 * This routine creates the driver components required to control the device
146 * (core, HCD, and PCD) and initializes the device. The driver components are
147 * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
148 * in the device private data. This allows the driver to access the dwc2_hsotg
149 * structure on subsequent calls to driver methods for this device.
151 static int dwc2_driver_probe(struct platform_device
*dev
)
153 const struct of_device_id
*match
;
154 const struct dwc2_core_params
*params
;
155 struct dwc2_core_params defparams
;
156 struct dwc2_hsotg
*hsotg
;
157 struct resource
*res
;
159 struct usb_phy
*uphy
;
163 match
= of_match_device(dwc2_of_match_table
, &dev
->dev
);
164 if (match
&& match
->data
) {
165 params
= match
->data
;
167 /* Default all params to autodetect */
168 dwc2_set_all_params(&defparams
, -1);
172 * Disable descriptor dma mode by default as the HW can support
173 * it, but does not support it for SPLIT transactions.
175 defparams
.dma_desc_enable
= 0;
178 hsotg
= devm_kzalloc(&dev
->dev
, sizeof(*hsotg
), GFP_KERNEL
);
182 hsotg
->dev
= &dev
->dev
;
185 * Use reasonable defaults so platforms don't have to provide these.
187 if (!dev
->dev
.dma_mask
)
188 dev
->dev
.dma_mask
= &dev
->dev
.coherent_dma_mask
;
189 retval
= dma_set_coherent_mask(&dev
->dev
, DMA_BIT_MASK(32));
193 irq
= platform_get_irq(dev
, 0);
195 dev_err(&dev
->dev
, "missing IRQ resource\n");
199 dev_dbg(hsotg
->dev
, "registering common handler for irq%d\n",
201 retval
= devm_request_irq(hsotg
->dev
, irq
,
202 dwc2_handle_common_intr
, IRQF_SHARED
,
203 dev_name(hsotg
->dev
), hsotg
);
207 res
= platform_get_resource(dev
, IORESOURCE_MEM
, 0);
208 hsotg
->regs
= devm_ioremap_resource(&dev
->dev
, res
);
209 if (IS_ERR(hsotg
->regs
))
210 return PTR_ERR(hsotg
->regs
);
212 dev_dbg(&dev
->dev
, "mapped PA %08lx to VA %p\n",
213 (unsigned long)res
->start
, hsotg
->regs
);
215 hsotg
->dr_mode
= of_usb_get_dr_mode(dev
->dev
.of_node
);
218 * Attempt to find a generic PHY, then look for an old style
221 phy
= devm_phy_get(&dev
->dev
, "usb2-phy");
224 uphy
= devm_usb_get_phy(&dev
->dev
, USB_PHY_TYPE_USB2
);
231 phy_power_on(hsotg
->phy
);
232 phy_init(hsotg
->phy
);
235 spin_lock_init(&hsotg
->lock
);
236 mutex_init(&hsotg
->init_mutex
);
237 retval
= dwc2_gadget_init(hsotg
, irq
);
240 retval
= dwc2_hcd_init(hsotg
, irq
, params
);
244 platform_set_drvdata(dev
, hsotg
);
249 static int __maybe_unused
dwc2_suspend(struct device
*dev
)
251 struct dwc2_hsotg
*dwc2
= dev_get_drvdata(dev
);
254 if (dwc2_is_device_mode(dwc2
)) {
255 ret
= s3c_hsotg_suspend(dwc2
);
257 if (dwc2
->lx_state
== DWC2_L0
)
260 phy_power_off(dwc2
->phy
);
266 static int __maybe_unused
dwc2_resume(struct device
*dev
)
268 struct dwc2_hsotg
*dwc2
= dev_get_drvdata(dev
);
271 if (dwc2_is_device_mode(dwc2
)) {
272 ret
= s3c_hsotg_resume(dwc2
);
274 phy_power_on(dwc2
->phy
);
281 static const struct dev_pm_ops dwc2_dev_pm_ops
= {
282 SET_SYSTEM_SLEEP_PM_OPS(dwc2_suspend
, dwc2_resume
)
285 static struct platform_driver dwc2_platform_driver
= {
287 .name
= dwc2_driver_name
,
288 .of_match_table
= dwc2_of_match_table
,
289 .pm
= &dwc2_dev_pm_ops
,
291 .probe
= dwc2_driver_probe
,
292 .remove
= dwc2_driver_remove
,
295 module_platform_driver(dwc2_platform_driver
);
297 MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
298 MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
299 MODULE_LICENSE("Dual BSD/GPL");