David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 1 | /* |
| 2 | * EHCI HCD glue for Cavium Octeon II SOCs. |
| 3 | * |
| 4 | * Loosely based on ehci-au1xxx.c |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file "COPYING" in the main directory of this archive |
| 8 | * for more details. |
| 9 | * |
| 10 | * Copyright (C) 2010 Cavium Networks |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/platform_device.h> |
| 15 | |
| 16 | #include <asm/octeon/octeon.h> |
| 17 | #include <asm/octeon/cvmx-uctlx-defs.h> |
| 18 | |
| 19 | #define OCTEON_EHCI_HCD_NAME "octeon-ehci" |
| 20 | |
| 21 | /* Common clock init code. */ |
| 22 | void octeon2_usb_clocks_start(void); |
| 23 | void octeon2_usb_clocks_stop(void); |
| 24 | |
| 25 | static void ehci_octeon_start(void) |
| 26 | { |
| 27 | union cvmx_uctlx_ehci_ctl ehci_ctl; |
| 28 | |
| 29 | octeon2_usb_clocks_start(); |
| 30 | |
| 31 | ehci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_EHCI_CTL(0)); |
| 32 | /* Use 64-bit addressing. */ |
| 33 | ehci_ctl.s.ehci_64b_addr_en = 1; |
| 34 | ehci_ctl.s.l2c_addr_msb = 0; |
| 35 | ehci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */ |
| 36 | ehci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */ |
| 37 | cvmx_write_csr(CVMX_UCTLX_EHCI_CTL(0), ehci_ctl.u64); |
| 38 | } |
| 39 | |
| 40 | static void ehci_octeon_stop(void) |
| 41 | { |
| 42 | octeon2_usb_clocks_stop(); |
| 43 | } |
| 44 | |
| 45 | static const struct hc_driver ehci_octeon_hc_driver = { |
| 46 | .description = hcd_name, |
| 47 | .product_desc = "Octeon EHCI", |
| 48 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 49 | |
| 50 | /* |
| 51 | * generic hardware linkage |
| 52 | */ |
| 53 | .irq = ehci_irq, |
Ming Lei | 428aac8 | 2013-07-03 22:53:11 +0800 | [diff] [blame] | 54 | .flags = HCD_MEMORY | HCD_USB2 | HCD_BH, |
David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 55 | |
| 56 | /* |
| 57 | * basic lifecycle operations |
| 58 | */ |
Alan Stern | 1a49e2a | 2012-07-09 15:55:14 -0400 | [diff] [blame] | 59 | .reset = ehci_setup, |
David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 60 | .start = ehci_run, |
| 61 | .stop = ehci_stop, |
| 62 | .shutdown = ehci_shutdown, |
| 63 | |
| 64 | /* |
| 65 | * managing i/o requests and associated device resources |
| 66 | */ |
| 67 | .urb_enqueue = ehci_urb_enqueue, |
| 68 | .urb_dequeue = ehci_urb_dequeue, |
| 69 | .endpoint_disable = ehci_endpoint_disable, |
| 70 | .endpoint_reset = ehci_endpoint_reset, |
| 71 | |
| 72 | /* |
| 73 | * scheduling support |
| 74 | */ |
| 75 | .get_frame_number = ehci_get_frame, |
| 76 | |
| 77 | /* |
| 78 | * root hub support |
| 79 | */ |
| 80 | .hub_status_data = ehci_hub_status_data, |
| 81 | .hub_control = ehci_hub_control, |
| 82 | .bus_suspend = ehci_bus_suspend, |
| 83 | .bus_resume = ehci_bus_resume, |
| 84 | .relinquish_port = ehci_relinquish_port, |
| 85 | .port_handed_over = ehci_port_handed_over, |
| 86 | |
| 87 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| 88 | }; |
| 89 | |
| 90 | static u64 ehci_octeon_dma_mask = DMA_BIT_MASK(64); |
| 91 | |
| 92 | static int ehci_octeon_drv_probe(struct platform_device *pdev) |
| 93 | { |
| 94 | struct usb_hcd *hcd; |
| 95 | struct ehci_hcd *ehci; |
| 96 | struct resource *res_mem; |
| 97 | int irq; |
| 98 | int ret; |
| 99 | |
| 100 | if (usb_disabled()) |
| 101 | return -ENODEV; |
| 102 | |
| 103 | irq = platform_get_irq(pdev, 0); |
| 104 | if (irq < 0) { |
| 105 | dev_err(&pdev->dev, "No irq assigned\n"); |
| 106 | return -ENODEV; |
| 107 | } |
| 108 | |
| 109 | res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 110 | if (res_mem == NULL) { |
| 111 | dev_err(&pdev->dev, "No register space assigned\n"); |
| 112 | return -ENODEV; |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * We can DMA from anywhere. But the descriptors must be in |
| 117 | * the lower 4GB. |
| 118 | */ |
David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 119 | pdev->dev.dma_mask = &ehci_octeon_dma_mask; |
Russell King | 22d9d8e | 2013-06-10 16:28:49 +0100 | [diff] [blame^] | 120 | ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); |
| 121 | if (ret) |
| 122 | return ret; |
David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 123 | |
| 124 | hcd = usb_create_hcd(&ehci_octeon_hc_driver, &pdev->dev, "octeon"); |
| 125 | if (!hcd) |
| 126 | return -ENOMEM; |
| 127 | |
| 128 | hcd->rsrc_start = res_mem->start; |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 129 | hcd->rsrc_len = resource_size(res_mem); |
David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 130 | |
| 131 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, |
| 132 | OCTEON_EHCI_HCD_NAME)) { |
| 133 | dev_err(&pdev->dev, "request_mem_region failed\n"); |
| 134 | ret = -EBUSY; |
| 135 | goto err1; |
| 136 | } |
| 137 | |
| 138 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 139 | if (!hcd->regs) { |
| 140 | dev_err(&pdev->dev, "ioremap failed\n"); |
| 141 | ret = -ENOMEM; |
| 142 | goto err2; |
| 143 | } |
| 144 | |
| 145 | ehci_octeon_start(); |
| 146 | |
| 147 | ehci = hcd_to_ehci(hcd); |
| 148 | |
| 149 | /* Octeon EHCI matches CPU endianness. */ |
| 150 | #ifdef __BIG_ENDIAN |
| 151 | ehci->big_endian_mmio = 1; |
| 152 | #endif |
| 153 | |
| 154 | ehci->caps = hcd->regs; |
Geoff Levand | 876e0df | 2011-11-22 18:04:45 -0800 | [diff] [blame] | 155 | |
Yong Zhang | b5dd18d | 2011-09-07 16:10:52 +0800 | [diff] [blame] | 156 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 157 | if (ret) { |
| 158 | dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret); |
| 159 | goto err3; |
| 160 | } |
| 161 | |
| 162 | platform_set_drvdata(pdev, hcd); |
| 163 | |
David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 164 | return 0; |
| 165 | err3: |
| 166 | ehci_octeon_stop(); |
| 167 | |
| 168 | iounmap(hcd->regs); |
| 169 | err2: |
| 170 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 171 | err1: |
| 172 | usb_put_hcd(hcd); |
| 173 | return ret; |
| 174 | } |
| 175 | |
| 176 | static int ehci_octeon_drv_remove(struct platform_device *pdev) |
| 177 | { |
| 178 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 179 | |
| 180 | usb_remove_hcd(hcd); |
| 181 | |
| 182 | ehci_octeon_stop(); |
| 183 | iounmap(hcd->regs); |
| 184 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 185 | usb_put_hcd(hcd); |
| 186 | |
David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | static struct platform_driver ehci_octeon_driver = { |
| 191 | .probe = ehci_octeon_drv_probe, |
| 192 | .remove = ehci_octeon_drv_remove, |
| 193 | .shutdown = usb_hcd_platform_shutdown, |
| 194 | .driver = { |
| 195 | .name = OCTEON_EHCI_HCD_NAME, |
| 196 | .owner = THIS_MODULE, |
| 197 | } |
| 198 | }; |
| 199 | |
| 200 | MODULE_ALIAS("platform:" OCTEON_EHCI_HCD_NAME); |