2 * platform.c - DesignWare HS OTG Controller platform driver
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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 },
134 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
137 * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
140 * @dev: Platform device
142 * This routine creates the driver components required to control the device
143 * (core, HCD, and PCD) and initializes the device. The driver components are
144 * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
145 * in the device private data. This allows the driver to access the dwc2_hsotg
146 * structure on subsequent calls to driver methods for this device.
148 static int dwc2_driver_probe(struct platform_device *dev)
150 const struct of_device_id *match;
151 const struct dwc2_core_params *params;
152 struct dwc2_core_params defparams;
153 struct dwc2_hsotg *hsotg;
154 struct resource *res;
161 match = of_match_device(dwc2_of_match_table, &dev->dev);
162 if (match && match->data) {
163 params = match->data;
165 /* Default all params to autodetect */
166 dwc2_set_all_params(&defparams, -1);
170 * Disable descriptor dma mode by default as the HW can support
171 * it, but does not support it for SPLIT transactions.
173 defparams.dma_desc_enable = 0;
176 hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
180 hsotg->dev = &dev->dev;
183 * Use reasonable defaults so platforms don't have to provide these.
185 if (!dev->dev.dma_mask)
186 dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
187 retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
191 irq = platform_get_irq(dev, 0);
193 dev_err(&dev->dev, "missing IRQ resource\n");
197 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
198 hsotg->regs = devm_ioremap_resource(&dev->dev, res);
199 if (IS_ERR(hsotg->regs))
200 return PTR_ERR(hsotg->regs);
202 dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
203 (unsigned long)res->start, hsotg->regs);
205 hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);
207 retval = dwc2_hcd_init(hsotg, irq, params);
211 platform_set_drvdata(dev, hsotg);
216 static struct platform_driver dwc2_platform_driver = {
218 .name = dwc2_driver_name,
219 .of_match_table = dwc2_of_match_table,
221 .probe = dwc2_driver_probe,
222 .remove = dwc2_driver_remove,
225 module_platform_driver(dwc2_platform_driver);
227 MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
229 MODULE_LICENSE("Dual BSD/GPL");