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
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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/platform_device.h>
45 #include <linux/usb/of.h>
50 static const char dwc2_driver_name[] = "dwc2";
52 static const struct dwc2_core_params params_bcm2835 = {
53 .otg_cap = 0, /* HNP/SRP capable */
54 .otg_ver = 0, /* 1.3 */
57 .speed = 0, /* High Speed */
58 .enable_dynamic_fifo = 1,
59 .en_multiple_tx_fifo = 1,
60 .host_rx_fifo_size = 774, /* 774 DWORDs */
61 .host_nperio_tx_fifo_size = 256, /* 256 DWORDs */
62 .host_perio_tx_fifo_size = 512, /* 512 DWORDs */
63 .max_transfer_size = 65535,
64 .max_packet_count = 511,
66 .phy_type = 1, /* UTMI */
67 .phy_utmi_width = 8, /* 8 bits */
68 .phy_ulpi_ddr = 0, /* Single */
69 .phy_ulpi_ext_vbus = 0,
72 .host_support_fs_ls_low_power = 0,
73 .host_ls_low_power_phy_clk = 0, /* 48 MHz */
80 static const struct dwc2_core_params params_rk3066 = {
81 .otg_cap = 2, /* non-HNP/non-SRP */
86 .enable_dynamic_fifo = 1,
87 .en_multiple_tx_fifo = -1,
88 .host_rx_fifo_size = 520, /* 520 DWORDs */
89 .host_nperio_tx_fifo_size = 128, /* 128 DWORDs */
90 .host_perio_tx_fifo_size = 256, /* 256 DWORDs */
91 .max_transfer_size = 65535,
92 .max_packet_count = -1,
97 .phy_ulpi_ext_vbus = -1,
100 .host_support_fs_ls_low_power = -1,
101 .host_ls_low_power_phy_clk = -1,
104 .ahbcfg = 0x7, /* INCR16 */
109 * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
112 * @dev: Platform device
114 * This routine is called, for example, when the rmmod command is executed. The
115 * device may or may not be electrically present. If it is present, the driver
116 * stops device processing. Any resources used on behalf of this device are
119 static int dwc2_driver_remove(struct platform_device *dev)
121 struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
123 dwc2_hcd_remove(hsotg);
128 static const struct of_device_id dwc2_of_match_table[] = {
129 { .compatible = "brcm,bcm2835-usb", .data = ¶ms_bcm2835 },
130 { .compatible = "rockchip,rk3066-usb", .data = ¶ms_rk3066 },
131 { .compatible = "snps,dwc2", .data = NULL },
132 { .compatible = "samsung,s3c6400-hsotg", .data = NULL},
135 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
138 * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
141 * @dev: Platform device
143 * This routine creates the driver components required to control the device
144 * (core, HCD, and PCD) and initializes the device. The driver components are
145 * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
146 * in the device private data. This allows the driver to access the dwc2_hsotg
147 * structure on subsequent calls to driver methods for this device.
149 static int dwc2_driver_probe(struct platform_device *dev)
151 const struct of_device_id *match;
152 const struct dwc2_core_params *params;
153 struct dwc2_core_params defparams;
154 struct dwc2_hsotg *hsotg;
155 struct resource *res;
162 match = of_match_device(dwc2_of_match_table, &dev->dev);
163 if (match && match->data) {
164 params = match->data;
166 /* Default all params to autodetect */
167 dwc2_set_all_params(&defparams, -1);
171 * Disable descriptor dma mode by default as the HW can support
172 * it, but does not support it for SPLIT transactions.
174 defparams.dma_desc_enable = 0;
177 hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
181 hsotg->dev = &dev->dev;
184 * Use reasonable defaults so platforms don't have to provide these.
186 if (!dev->dev.dma_mask)
187 dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
188 retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
192 irq = platform_get_irq(dev, 0);
194 dev_err(&dev->dev, "missing IRQ resource\n");
198 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
199 hsotg->regs = devm_ioremap_resource(&dev->dev, res);
200 if (IS_ERR(hsotg->regs))
201 return PTR_ERR(hsotg->regs);
203 dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
204 (unsigned long)res->start, hsotg->regs);
206 hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);
208 retval = dwc2_hcd_init(hsotg, irq, params);
212 platform_set_drvdata(dev, hsotg);
217 static struct platform_driver dwc2_platform_driver = {
219 .name = dwc2_driver_name,
220 .of_match_table = dwc2_of_match_table,
222 .probe = dwc2_driver_probe,
223 .remove = dwc2_driver_remove,
226 module_platform_driver(dwc2_platform_driver);
228 MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
229 MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
230 MODULE_LICENSE("Dual BSD/GPL");