diff options
Diffstat (limited to 'target/linux/oxnas/files/drivers/usb/host/ehci-oxnas.c')
| -rw-r--r-- | target/linux/oxnas/files/drivers/usb/host/ehci-oxnas.c | 316 |
1 files changed, 0 insertions, 316 deletions
diff --git a/target/linux/oxnas/files/drivers/usb/host/ehci-oxnas.c b/target/linux/oxnas/files/drivers/usb/host/ehci-oxnas.c deleted file mode 100644 index 15578a3027..0000000000 --- a/target/linux/oxnas/files/drivers/usb/host/ehci-oxnas.c +++ /dev/null @@ -1,316 +0,0 @@ -/* - * drivers/usb/host/ehci-oxnas.c - * - * Tzachi Perelstein <tzachi@marvell.com> - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/usb.h> -#include <linux/usb/hcd.h> -#include <linux/dma-mapping.h> -#include <linux/clk.h> -#include <linux/reset.h> -#include <mach/hardware.h> -#include <mach/utils.h> - -#include "ehci.h" - -struct oxnas_hcd { - struct clk *clk; - struct clk *refsrc; - struct clk *phyref; - int use_pllb; - int use_phya; - struct reset_control *rst_host; - struct reset_control *rst_phya; - struct reset_control *rst_phyb; -}; - -#define DRIVER_DESC "Oxnas On-Chip EHCI Host Controller" - -static struct hc_driver __read_mostly oxnas_hc_driver; - -static void start_oxnas_usb_ehci(struct oxnas_hcd *oxnas) -{ - u32 reg; - - if (oxnas->use_pllb) { - /* enable pllb */ - clk_prepare_enable(oxnas->refsrc); - /* enable ref600 */ - clk_prepare_enable(oxnas->phyref); - /* 600MHz pllb divider for 12MHz */ - writel(PLLB_DIV_INT(50) | PLLB_DIV_FRAC(0), - SEC_CTRL_PLLB_DIV_CTRL); - - } else { - /* ref 300 divider for 12MHz */ - writel(REF300_DIV_INT(25) | REF300_DIV_FRAC(0), - SYS_CTRL_REF300_DIV); - } - - /* Ensure the USB block is properly reset */ - reset_control_reset(oxnas->rst_host); - reset_control_reset(oxnas->rst_phya); - reset_control_reset(oxnas->rst_phyb); - - /* Force the high speed clock to be generated all the time, via serial - programming of the USB HS PHY */ - writel((2UL << USBHSPHY_TEST_ADD) | - (0xe0UL << USBHSPHY_TEST_DIN), SYS_CTRL_USBHSPHY_CTRL); - - writel((1UL << USBHSPHY_TEST_CLK) | - (2UL << USBHSPHY_TEST_ADD) | - (0xe0UL << USBHSPHY_TEST_DIN), SYS_CTRL_USBHSPHY_CTRL); - - writel((0xfUL << USBHSPHY_TEST_ADD) | - (0xaaUL << USBHSPHY_TEST_DIN), SYS_CTRL_USBHSPHY_CTRL); - - writel((1UL << USBHSPHY_TEST_CLK) | - (0xfUL << USBHSPHY_TEST_ADD) | - (0xaaUL << USBHSPHY_TEST_DIN), SYS_CTRL_USBHSPHY_CTRL); - - if (oxnas->use_pllb) /* use pllb clock */ - writel(USB_CLK_INTERNAL | USB_INT_CLK_PLLB, SYS_CTRL_USB_CTRL); - else /* use ref300 derived clock */ - writel(USB_CLK_INTERNAL | USB_INT_CLK_REF300, - SYS_CTRL_USB_CTRL); - - if (oxnas->use_phya) { - /* Configure USB PHYA as a host */ - reg = readl(SYS_CTRL_USB_CTRL); - reg &= ~USBAMUX_DEVICE; - writel(reg, SYS_CTRL_USB_CTRL); - } - - /* Enable the clock to the USB block */ - clk_prepare_enable(oxnas->clk); -} - -static void stop_oxnas_usb_ehci(struct oxnas_hcd *oxnas) -{ - reset_control_assert(oxnas->rst_host); - reset_control_assert(oxnas->rst_phya); - reset_control_assert(oxnas->rst_phyb); - - if (oxnas->use_pllb) { - clk_disable_unprepare(oxnas->phyref); - clk_disable_unprepare(oxnas->refsrc); - } - clk_disable_unprepare(oxnas->clk); -} - -static int ehci_oxnas_reset(struct usb_hcd *hcd) -{ - #define txttfill_tuning reserved2[0] - - struct ehci_hcd *ehci; - u32 tmp; - int retval = ehci_setup(hcd); - if (retval) - return retval; - - ehci = hcd_to_ehci(hcd); - tmp = ehci_readl(ehci, &ehci->regs->txfill_tuning); - tmp &= ~0x00ff0000; - tmp |= 0x003f0000; /* set burst pre load count to 0x40 (63 * 4 bytes) */ - tmp |= 0x16; /* set sheduler overhead to 22 * 1.267us (HS) or 22 * 6.33us (FS/LS)*/ - ehci_writel(ehci, tmp, &ehci->regs->txfill_tuning); - - tmp = ehci_readl(ehci, &ehci->regs->txttfill_tuning); - tmp |= 0x2; /* set sheduler overhead to 2 * 6.333us */ - ehci_writel(ehci, tmp, &ehci->regs->txttfill_tuning); - - return retval; -} - -static int ehci_oxnas_drv_probe(struct platform_device *ofdev) -{ - struct device_node *np = ofdev->dev.of_node; - struct usb_hcd *hcd; - struct ehci_hcd *ehci; - struct resource res; - struct oxnas_hcd *oxnas; - int irq, err; - struct reset_control *rstc; - - if (usb_disabled()) - return -ENODEV; - - if (!ofdev->dev.dma_mask) - ofdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask; - if (!ofdev->dev.coherent_dma_mask) - ofdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); - - hcd = usb_create_hcd(&oxnas_hc_driver, &ofdev->dev, - dev_name(&ofdev->dev)); - if (!hcd) - return -ENOMEM; - - err = of_address_to_resource(np, 0, &res); - if (err) - goto err_res; - - hcd->rsrc_start = res.start; - hcd->rsrc_len = resource_size(&res); - - hcd->regs = devm_ioremap_resource(&ofdev->dev, &res); - if (IS_ERR(hcd->regs)) { - dev_err(&ofdev->dev, "devm_ioremap_resource failed\n"); - err = PTR_ERR(hcd->regs); - goto err_ioremap; - } - - oxnas = (struct oxnas_hcd *)hcd_to_ehci(hcd)->priv; - - oxnas->use_pllb = of_property_read_bool(np, "plxtech,ehci_use_pllb"); - oxnas->use_phya = of_property_read_bool(np, "plxtech,ehci_use_phya"); - - oxnas->clk = of_clk_get_by_name(np, "usb"); - if (IS_ERR(oxnas->clk)) { - err = PTR_ERR(oxnas->clk); - goto err_clk; - } - - if (oxnas->use_pllb) { - oxnas->refsrc = of_clk_get_by_name(np, "refsrc"); - if (IS_ERR(oxnas->refsrc)) { - err = PTR_ERR(oxnas->refsrc); - goto err_refsrc; - } - oxnas->phyref = of_clk_get_by_name(np, "phyref"); - if (IS_ERR(oxnas->refsrc)) { - err = PTR_ERR(oxnas->refsrc); - goto err_phyref; - } - - } else { - oxnas->refsrc = NULL; - oxnas->phyref = NULL; - } - - rstc = devm_reset_control_get(&ofdev->dev, "host"); - if (IS_ERR(rstc)) { - err = PTR_ERR(rstc); - goto err_rst; - } - oxnas->rst_host = rstc; - - rstc = devm_reset_control_get(&ofdev->dev, "phya"); - if (IS_ERR(rstc)) { - err = PTR_ERR(rstc); - goto err_rst; - } - oxnas->rst_phya = rstc; - - rstc = devm_reset_control_get(&ofdev->dev, "phyb"); - if (IS_ERR(rstc)) { - err = PTR_ERR(rstc); - goto err_rst; - } - oxnas->rst_phyb = rstc; - - irq = irq_of_parse_and_map(np, 0); - if (!irq) { - dev_err(&ofdev->dev, "irq_of_parse_and_map failed\n"); - err = -EBUSY; - goto err_irq; - } - - hcd->has_tt = 1; - ehci = hcd_to_ehci(hcd); - ehci->caps = hcd->regs; - - start_oxnas_usb_ehci(oxnas); - - err = usb_add_hcd(hcd, irq, IRQF_SHARED); - if (err) - goto err_hcd; - - return 0; - -err_hcd: - stop_oxnas_usb_ehci(oxnas); -err_irq: -err_rst: - if (oxnas->phyref) - clk_put(oxnas->phyref); -err_phyref: - if (oxnas->refsrc) - clk_put(oxnas->refsrc); -err_refsrc: - clk_put(oxnas->clk); -err_clk: -err_ioremap: -err_res: - usb_put_hcd(hcd); - - return err; -} - -static int ehci_oxnas_drv_remove(struct platform_device *pdev) -{ - struct usb_hcd *hcd = platform_get_drvdata(pdev); - struct oxnas_hcd *oxnas = (struct oxnas_hcd *)hcd_to_ehci(hcd)->priv; - - usb_remove_hcd(hcd); - if (oxnas->use_pllb) { - clk_disable_unprepare(oxnas->phyref); - clk_put(oxnas->phyref); - clk_disable_unprepare(oxnas->refsrc); - clk_put(oxnas->refsrc); - } - clk_disable_unprepare(oxnas->clk); - usb_put_hcd(hcd); - - return 0; -} - -static const struct of_device_id oxnas_ehci_dt_ids[] = { - { .compatible = "plxtech,nas782x-ehci" }, - { /* sentinel */ } -}; - -MODULE_DEVICE_TABLE(of, oxnas_ehci_dt_ids); - -static struct platform_driver ehci_oxnas_driver = { - .probe = ehci_oxnas_drv_probe, - .remove = ehci_oxnas_drv_remove, - .shutdown = usb_hcd_platform_shutdown, - .driver.name = "oxnas-ehci", - .driver.of_match_table = oxnas_ehci_dt_ids, -}; - -static const struct ehci_driver_overrides oxnas_overrides __initconst = { - .reset = ehci_oxnas_reset, - .extra_priv_size = sizeof(struct oxnas_hcd), -}; - -static int __init ehci_oxnas_init(void) -{ - if (usb_disabled()) - return -ENODEV; - - ehci_init_driver(&oxnas_hc_driver, &oxnas_overrides); - return platform_driver_register(&ehci_oxnas_driver); -} -module_init(ehci_oxnas_init); - -static void __exit ehci_oxnas_cleanup(void) -{ - platform_driver_unregister(&ehci_oxnas_driver); -} -module_exit(ehci_oxnas_cleanup); - -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_ALIAS("platform:oxnas-ehci"); -MODULE_LICENSE("GPL"); |