projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 760efe69 ML |
1 | /* |
| 2 | * Copyright 2008 Cavium Networks | |
| 3 | * | |
| 4 | * This file is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License, Version 2, as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | */ | |
| 8 | ||
| 9 | #include <linux/platform_device.h> | |
| 10 | #include <linux/atomic.h> | |
| 11 | #include <mach/cns3xxx.h> | |
| 12 | #include <mach/pm.h> | |
| 13 | ||
| 14 | static int cns3xxx_ehci_init(struct usb_hcd *hcd) | |
| 15 | { | |
| 16 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
| 17 | int retval; | |
| 18 | ||
| 19 | /* | |
| 20 | * EHCI and OHCI share the same clock and power, | |
| 21 | * resetting twice would cause the 1st controller been reset. | |
| 22 | * Therefore only do power up at the first up device, and | |
| 23 | * power down at the last down device. | |
| 24 | * | |
| 25 | * Set USB AHB INCR length to 16 | |
| 26 | */ | |
| 27 | if (atomic_inc_return(&usb_pwr_ref) == 1) { | |
| 28 | cns3xxx_pwr_power_up(1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_PLL_USB); | |
| 29 | cns3xxx_pwr_clk_en(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST); | |
| 30 | cns3xxx_pwr_soft_rst(1 << PM_SOFT_RST_REG_OFFST_USB_HOST); | |
| 31 | __raw_writel((__raw_readl(MISC_CHIP_CONFIG_REG) | (0X2 << 24)), | |
| 32 | MISC_CHIP_CONFIG_REG); | |
| 33 | } | |
| 34 | ||
| 35 | ehci->caps = hcd->regs; | |
| 760efe69 ML |
36 | |
| 37 | hcd->has_tt = 0; | |
| 760efe69 | 38 | |
| 1a49e2ac | 39 | retval = ehci_setup(hcd); |
| 760efe69 ML |
40 | if (retval) |
| 41 | return retval; | |
| 42 | ||
| 43 | ehci_port_power(ehci, 0); | |
| 44 | ||
| 45 | return retval; | |
| 46 | } | |
| 47 | ||
| 48 | static const struct hc_driver cns3xxx_ehci_hc_driver = { | |
| 49 | .description = hcd_name, | |
| 50 | .product_desc = "CNS3XXX EHCI Host Controller", | |
| 51 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
| 52 | .irq = ehci_irq, | |
| 53 | .flags = HCD_MEMORY | HCD_USB2, | |
| 54 | .reset = cns3xxx_ehci_init, | |
| 55 | .start = ehci_run, | |
| 56 | .stop = ehci_stop, | |
| 57 | .shutdown = ehci_shutdown, | |
| 58 | .urb_enqueue = ehci_urb_enqueue, | |
| 59 | .urb_dequeue = ehci_urb_dequeue, | |
| 60 | .endpoint_disable = ehci_endpoint_disable, | |
| 61 | .endpoint_reset = ehci_endpoint_reset, | |
| 62 | .get_frame_number = ehci_get_frame, | |
| 63 | .hub_status_data = ehci_hub_status_data, | |
| 64 | .hub_control = ehci_hub_control, | |
| 65 | #ifdef CONFIG_PM | |
| 66 | .bus_suspend = ehci_bus_suspend, | |
| 67 | .bus_resume = ehci_bus_resume, | |
| 68 | #endif | |
| 69 | .relinquish_port = ehci_relinquish_port, | |
| 70 | .port_handed_over = ehci_port_handed_over, | |
| 71 | ||
| 72 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
| 73 | }; | |
| 74 | ||
| 75 | static int cns3xxx_ehci_probe(struct platform_device *pdev) | |
| 76 | { | |
| 77 | struct device *dev = &pdev->dev; | |
| 78 | struct usb_hcd *hcd; | |
| 79 | const struct hc_driver *driver = &cns3xxx_ehci_hc_driver; | |
| 80 | struct resource *res; | |
| 81 | int irq; | |
| 82 | int retval; | |
| 83 | ||
| 84 | if (usb_disabled()) | |
| 85 | return -ENODEV; | |
| 86 | ||
| 87 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
| 88 | if (!res) { | |
| 89 | dev_err(dev, "Found HC with no IRQ.\n"); | |
| 90 | return -ENODEV; | |
| 91 | } | |
| 92 | irq = res->start; | |
| 93 | ||
| 94 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); | |
| 95 | if (!hcd) | |
| 96 | return -ENOMEM; | |
| 97 | ||
| 98 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 99 | if (!res) { | |
| 100 | dev_err(dev, "Found HC with no register addr.\n"); | |
| 101 | retval = -ENODEV; | |
| 102 | goto err1; | |
| 103 | } | |
| 104 | ||
| 105 | hcd->rsrc_start = res->start; | |
| 28f65c11 | 106 | hcd->rsrc_len = resource_size(res); |
| 760efe69 ML |
107 | |
| 108 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, | |
| 109 | driver->description)) { | |
| 110 | dev_dbg(dev, "controller already in use\n"); | |
| 111 | retval = -EBUSY; | |
| 112 | goto err1; | |
| 113 | } | |
| 114 | ||
| 115 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
| 116 | if (hcd->regs == NULL) { | |
| 117 | dev_dbg(dev, "error mapping memory\n"); | |
| 118 | retval = -EFAULT; | |
| 119 | goto err2; | |
| 120 | } | |
| 121 | ||
| 122 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); | |
| 123 | if (retval == 0) | |
| 124 | return retval; | |
| 125 | ||
| 126 | iounmap(hcd->regs); | |
| 127 | err2: | |
| 128 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
| 129 | err1: | |
| 130 | usb_put_hcd(hcd); | |
| 131 | ||
| 132 | return retval; | |
| 133 | } | |
| 134 | ||
| 135 | static int cns3xxx_ehci_remove(struct platform_device *pdev) | |
| 136 | { | |
| 137 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
| 138 | ||
| 139 | usb_remove_hcd(hcd); | |
| 140 | iounmap(hcd->regs); | |
| 141 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
| 142 | ||
| 143 | /* | |
| 144 | * EHCI and OHCI share the same clock and power, | |
| 145 | * resetting twice would cause the 1st controller been reset. | |
| 146 | * Therefore only do power up at the first up device, and | |
| 147 | * power down at the last down device. | |
| 148 | */ | |
| 149 | if (atomic_dec_return(&usb_pwr_ref) == 0) | |
| 150 | cns3xxx_pwr_clk_dis(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST); | |
| 151 | ||
| 152 | usb_put_hcd(hcd); | |
| 153 | ||
| 154 | platform_set_drvdata(pdev, NULL); | |
| 155 | ||
| 156 | return 0; | |
| 157 | } | |
| 158 | ||
| 159 | MODULE_ALIAS("platform:cns3xxx-ehci"); | |
| 160 | ||
| 161 | static struct platform_driver cns3xxx_ehci_driver = { | |
| 162 | .probe = cns3xxx_ehci_probe, | |
| 163 | .remove = cns3xxx_ehci_remove, | |
| 164 | .driver = { | |
| 165 | .name = "cns3xxx-ehci", | |
| 166 | }, | |
| 167 | }; |