Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 1 | /* |
| 2 | * linux/driver/usb/host/ehci-w90x900.c |
| 3 | * |
| 4 | * Copyright (c) 2008 Nuvoton technology corporation. |
| 5 | * |
| 6 | * Wan ZongShun <mcuos.com@gmail.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation;version 2 of the License. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/platform_device.h> |
| 15 | |
Justin P. Mattock | bd066ee | 2012-10-23 07:45:01 -0700 | [diff] [blame] | 16 | /* enable phy0 and phy1 for w90p910 */ |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 17 | #define ENPHY (0x01<<8) |
| 18 | #define PHY0_CTR (0xA4) |
| 19 | #define PHY1_CTR (0xA8) |
| 20 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 21 | static int usb_w90x900_probe(const struct hc_driver *driver, |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 22 | struct platform_device *pdev) |
| 23 | { |
| 24 | struct usb_hcd *hcd; |
| 25 | struct ehci_hcd *ehci; |
| 26 | struct resource *res; |
| 27 | int retval = 0, irq; |
| 28 | unsigned long val; |
| 29 | |
| 30 | |
| 31 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 32 | if (!res) { |
| 33 | retval = -ENXIO; |
| 34 | goto err1; |
| 35 | } |
| 36 | |
| 37 | hcd = usb_create_hcd(driver, &pdev->dev, "w90x900 EHCI"); |
| 38 | if (!hcd) { |
| 39 | retval = -ENOMEM; |
| 40 | goto err1; |
| 41 | } |
| 42 | |
| 43 | hcd->rsrc_start = res->start; |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 44 | hcd->rsrc_len = resource_size(res); |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 45 | |
| 46 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| 47 | retval = -EBUSY; |
| 48 | goto err2; |
| 49 | } |
| 50 | |
| 51 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 52 | if (hcd->regs == NULL) { |
| 53 | retval = -EFAULT; |
| 54 | goto err3; |
| 55 | } |
| 56 | |
| 57 | ehci = hcd_to_ehci(hcd); |
| 58 | ehci->caps = hcd->regs; |
| 59 | ehci->regs = hcd->regs + |
Jan Andersson | c430131 | 2011-05-03 20:11:57 +0200 | [diff] [blame] | 60 | HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 61 | |
| 62 | /* enable PHY 0,1,the regs only apply to w90p910 |
| 63 | * 0xA4,0xA8 were offsets of PHY0 and PHY1 controller of |
| 64 | * w90p910 IC relative to ehci->regs. |
| 65 | */ |
| 66 | val = __raw_readl(ehci->regs+PHY0_CTR); |
| 67 | val |= ENPHY; |
| 68 | __raw_writel(val, ehci->regs+PHY0_CTR); |
| 69 | |
| 70 | val = __raw_readl(ehci->regs+PHY1_CTR); |
| 71 | val |= ENPHY; |
| 72 | __raw_writel(val, ehci->regs+PHY1_CTR); |
| 73 | |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 74 | irq = platform_get_irq(pdev, 0); |
| 75 | if (irq < 0) |
| 76 | goto err4; |
| 77 | |
| 78 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); |
| 79 | if (retval != 0) |
| 80 | goto err4; |
| 81 | |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 82 | return retval; |
| 83 | err4: |
| 84 | iounmap(hcd->regs); |
| 85 | err3: |
| 86 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 87 | err2: |
| 88 | usb_put_hcd(hcd); |
| 89 | err1: |
| 90 | return retval; |
| 91 | } |
| 92 | |
| 93 | static |
| 94 | void usb_w90x900_remove(struct usb_hcd *hcd, struct platform_device *pdev) |
| 95 | { |
| 96 | usb_remove_hcd(hcd); |
| 97 | iounmap(hcd->regs); |
| 98 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 99 | usb_put_hcd(hcd); |
| 100 | } |
| 101 | |
| 102 | static const struct hc_driver ehci_w90x900_hc_driver = { |
| 103 | .description = hcd_name, |
| 104 | .product_desc = "Nuvoton w90x900 EHCI Host Controller", |
| 105 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 106 | |
| 107 | /* |
| 108 | * generic hardware linkage |
| 109 | */ |
| 110 | .irq = ehci_irq, |
| 111 | .flags = HCD_USB2|HCD_MEMORY, |
| 112 | |
| 113 | /* |
| 114 | * basic lifecycle operations |
| 115 | */ |
Alan Stern | 1a49e2a | 2012-07-09 15:55:14 -0400 | [diff] [blame] | 116 | .reset = ehci_setup, |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 117 | .start = ehci_run, |
| 118 | |
| 119 | .stop = ehci_stop, |
| 120 | .shutdown = ehci_shutdown, |
| 121 | |
| 122 | /* |
| 123 | * managing i/o requests and associated device resources |
| 124 | */ |
| 125 | .urb_enqueue = ehci_urb_enqueue, |
| 126 | .urb_dequeue = ehci_urb_dequeue, |
| 127 | .endpoint_disable = ehci_endpoint_disable, |
Paul Mundt | b48d7f5 | 2010-11-30 17:57:02 +0900 | [diff] [blame] | 128 | .endpoint_reset = ehci_endpoint_reset, |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 129 | |
| 130 | /* |
| 131 | * scheduling support |
| 132 | */ |
| 133 | .get_frame_number = ehci_get_frame, |
| 134 | |
| 135 | /* |
| 136 | * root hub support |
| 137 | */ |
| 138 | .hub_status_data = ehci_hub_status_data, |
| 139 | .hub_control = ehci_hub_control, |
| 140 | #ifdef CONFIG_PM |
| 141 | .bus_suspend = ehci_bus_suspend, |
| 142 | .bus_resume = ehci_bus_resume, |
| 143 | #endif |
| 144 | .relinquish_port = ehci_relinquish_port, |
| 145 | .port_handed_over = ehci_port_handed_over, |
Paul Mundt | b48d7f5 | 2010-11-30 17:57:02 +0900 | [diff] [blame] | 146 | |
| 147 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 148 | }; |
| 149 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 150 | static int ehci_w90x900_probe(struct platform_device *pdev) |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 151 | { |
| 152 | if (usb_disabled()) |
| 153 | return -ENODEV; |
| 154 | |
| 155 | return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev); |
| 156 | } |
| 157 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame^] | 158 | static int ehci_w90x900_remove(struct platform_device *pdev) |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 159 | { |
| 160 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 161 | |
| 162 | usb_w90x900_remove(hcd, pdev); |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static struct platform_driver ehci_hcd_w90x900_driver = { |
| 168 | .probe = ehci_w90x900_probe, |
Bill Pemberton | 7690417 | 2012-11-19 13:21:08 -0500 | [diff] [blame] | 169 | .remove = ehci_w90x900_remove, |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 170 | .driver = { |
| 171 | .name = "w90x900-ehci", |
| 172 | .owner = THIS_MODULE, |
| 173 | }, |
| 174 | }; |
| 175 | |
| 176 | MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>"); |
| 177 | MODULE_DESCRIPTION("w90p910 usb ehci driver!"); |
| 178 | MODULE_LICENSE("GPL"); |
| 179 | MODULE_ALIAS("platform:w90p910-ehci"); |