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 __devinit | |
| 15 | cns3xxx_ohci_start(struct usb_hcd *hcd) | |
| 16 | { | |
| 17 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
| 18 | int ret; | |
| 19 | ||
| 20 | /* | |
| 21 | * EHCI and OHCI share the same clock and power, | |
| 22 | * resetting twice would cause the 1st controller been reset. | |
| 23 | * Therefore only do power up at the first up device, and | |
| 24 | * power down at the last down device. | |
| 25 | * | |
| 26 | * Set USB AHB INCR length to 16 | |
| 27 | */ | |
| 28 | if (atomic_inc_return(&usb_pwr_ref) == 1) { | |
| 29 | cns3xxx_pwr_power_up(1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_PLL_USB); | |
| 30 | cns3xxx_pwr_clk_en(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST); | |
| 31 | cns3xxx_pwr_soft_rst(1 << PM_SOFT_RST_REG_OFFST_USB_HOST); | |
| 32 | __raw_writel((__raw_readl(MISC_CHIP_CONFIG_REG) | (0X2 << 24)), | |
| 33 | MISC_CHIP_CONFIG_REG); | |
| 34 | } | |
| 35 | ||
| 36 | ret = ohci_init(ohci); | |
| 37 | if (ret < 0) | |
| 38 | return ret; | |
| 39 | ||
| 40 | ohci->num_ports = 1; | |
| 41 | ||
| 42 | ret = ohci_run(ohci); | |
| 43 | if (ret < 0) { | |
| bd0c092b GKH |
44 | dev_err(hcd->self.controller, "can't start %s\n", |
| 45 | hcd->self.bus_name); | |
| 760efe69 ML |
46 | ohci_stop(hcd); |
| 47 | return ret; | |
| 48 | } | |
| 49 | return 0; | |
| 50 | } | |
| 51 | ||
| 52 | static const struct hc_driver cns3xxx_ohci_hc_driver = { | |
| 53 | .description = hcd_name, | |
| 54 | .product_desc = "CNS3XXX OHCI Host controller", | |
| 55 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
| 56 | .irq = ohci_irq, | |
| 57 | .flags = HCD_USB11 | HCD_MEMORY, | |
| 58 | .start = cns3xxx_ohci_start, | |
| 59 | .stop = ohci_stop, | |
| 60 | .shutdown = ohci_shutdown, | |
| 61 | .urb_enqueue = ohci_urb_enqueue, | |
| 62 | .urb_dequeue = ohci_urb_dequeue, | |
| 63 | .endpoint_disable = ohci_endpoint_disable, | |
| 64 | .get_frame_number = ohci_get_frame, | |
| 65 | .hub_status_data = ohci_hub_status_data, | |
| 66 | .hub_control = ohci_hub_control, | |
| 67 | #ifdef CONFIG_PM | |
| 68 | .bus_suspend = ohci_bus_suspend, | |
| 69 | .bus_resume = ohci_bus_resume, | |
| 70 | #endif | |
| 71 | .start_port_reset = ohci_start_port_reset, | |
| 72 | }; | |
| 73 | ||
| 74 | static int cns3xxx_ohci_probe(struct platform_device *pdev) | |
| 75 | { | |
| 76 | struct device *dev = &pdev->dev; | |
| 77 | struct usb_hcd *hcd; | |
| 78 | const struct hc_driver *driver = &cns3xxx_ohci_hc_driver; | |
| 79 | struct resource *res; | |
| 80 | int irq; | |
| 81 | int retval; | |
| 82 | ||
| 83 | if (usb_disabled()) | |
| 84 | return -ENODEV; | |
| 85 | ||
| 86 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
| 87 | if (!res) { | |
| 88 | dev_err(dev, "Found HC with no IRQ.\n"); | |
| 89 | return -ENODEV; | |
| 90 | } | |
| 91 | irq = res->start; | |
| 92 | ||
| 93 | hcd = usb_create_hcd(driver, dev, dev_name(dev)); | |
| 94 | if (!hcd) | |
| 95 | return -ENOMEM; | |
| 96 | ||
| 97 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 98 | if (!res) { | |
| 99 | dev_err(dev, "Found HC with no register addr.\n"); | |
| 100 | retval = -ENODEV; | |
| 101 | goto err1; | |
| 102 | } | |
| 103 | hcd->rsrc_start = res->start; | |
| 28f65c11 | 104 | hcd->rsrc_len = resource_size(res); |
| 760efe69 ML |
105 | |
| 106 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, | |
| 107 | driver->description)) { | |
| 108 | dev_dbg(dev, "controller already in use\n"); | |
| 109 | retval = -EBUSY; | |
| 110 | goto err1; | |
| 111 | } | |
| 112 | ||
| 113 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
| 114 | if (!hcd->regs) { | |
| 115 | dev_dbg(dev, "error mapping memory\n"); | |
| 116 | retval = -EFAULT; | |
| 117 | goto err2; | |
| 118 | } | |
| 119 | ||
| 120 | ohci_hcd_init(hcd_to_ohci(hcd)); | |
| 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 | return retval; | |
| 132 | } | |
| 133 | ||
| 134 | static int cns3xxx_ohci_remove(struct platform_device *pdev) | |
| 135 | { | |
| 136 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
| 137 | ||
| 138 | usb_remove_hcd(hcd); | |
| 139 | iounmap(hcd->regs); | |
| 140 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
| 141 | ||
| 142 | /* | |
| 143 | * EHCI and OHCI share the same clock and power, | |
| 144 | * resetting twice would cause the 1st controller been reset. | |
| 145 | * Therefore only do power up at the first up device, and | |
| 146 | * power down at the last down device. | |
| 147 | */ | |
| 148 | if (atomic_dec_return(&usb_pwr_ref) == 0) | |
| 149 | cns3xxx_pwr_clk_dis(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST); | |
| 150 | ||
| 151 | usb_put_hcd(hcd); | |
| 152 | ||
| 153 | platform_set_drvdata(pdev, NULL); | |
| 154 | ||
| 155 | return 0; | |
| 156 | } | |
| 157 | ||
| 158 | MODULE_ALIAS("platform:cns3xxx-ohci"); | |
| 159 | ||
| 160 | static struct platform_driver ohci_hcd_cns3xxx_driver = { | |
| 161 | .probe = cns3xxx_ohci_probe, | |
| 162 | .remove = cns3xxx_ohci_remove, | |
| 163 | .driver = { | |
| 164 | .name = "cns3xxx-ohci", | |
| 165 | }, | |
| 166 | }; |