/* * driver for NXP USB Host devices * * Currently supported OHCI host devices: * - NXP LPC32xx * * Authors: Dmitry Chigirev * Vitaly Wool * * register initialization is based on code examples provided by Philips * Copyright (c) 2005 Koninklijke Philips Electronics N.V. * * NOTE: This driver does not have suspend/resume functionality * This driver is intended for engineering development purposes only * * 2005-2006 (c) MontaVista Software, Inc. 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 #include #include #include #include #include #include #include #include #include #define USB_CONFIG_BASE 0x31020000 #define PWRMAN_BASE 0x40004000 #define USB_CTRL IO_ADDRESS(PWRMAN_BASE + 0x64) /* USB_CTRL bit defines */ #define USB_SLAVE_HCLK_EN (1 << 24) #define USB_DEV_NEED_CLK_EN (1 << 22) #define USB_HOST_NEED_CLK_EN (1 << 21) #define PAD_CONTROL_LAST_DRIVEN (1 << 19) #define USB_OTG_STAT_CONTROL IO_ADDRESS(USB_CONFIG_BASE + 0x110) /* USB_OTG_STAT_CONTROL bit defines */ #define TRANSPARENT_I2C_EN (1 << 7) #define HOST_EN (1 << 0) /* On LPC32xx, those are undefined */ #ifndef start_int_set_falling_edge #define start_int_set_falling_edge(irq) #define start_int_set_rising_edge(irq) #define start_int_ack(irq) #define start_int_mask(irq) #define start_int_umask(irq) #endif static struct i2c_client *isp1301_i2c_client; extern int usb_disabled(void); static struct clk *usb_pll_clk; static struct clk *usb_dev_clk; static struct clk *usb_otg_clk; static void isp1301_configure_lpc32xx(void) { /* LPC32XX only supports DAT_SE0 USB mode */ /* This sequence is important */ /* Disable transparent UART mode first */ i2c_smbus_write_byte_data(isp1301_i2c_client, (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), MC1_UART_EN); i2c_smbus_write_byte_data(isp1301_i2c_client, (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~MC1_SPEED_REG); i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG); i2c_smbus_write_byte_data(isp1301_i2c_client, (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL)); i2c_smbus_write_byte_data(isp1301_i2c_client, (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0); i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); i2c_smbus_write_byte_data(isp1301_i2c_client, (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), (OTG1_DM_PULLUP | OTG1_DP_PULLUP)); i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0); i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); /* Enable usb_need_clk clock after transceiver is initialized */ __raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL); printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n", i2c_smbus_read_word_data(isp1301_i2c_client, 0x00)); printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n", i2c_smbus_read_word_data(isp1301_i2c_client, 0x02)); printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n", i2c_smbus_read_word_data(isp1301_i2c_client, 0x14)); } static void isp1301_configure(void) { isp1301_configure_lpc32xx(); } static inline void isp1301_vbus_on(void) { i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV); } static inline void isp1301_vbus_off(void) { i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, OTG1_VBUS_DRV); } static void nxp_start_hc(void) { unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN; __raw_writel(tmp, USB_OTG_STAT_CONTROL); isp1301_vbus_on(); } static void nxp_stop_hc(void) { unsigned long tmp; isp1301_vbus_off(); tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN; __raw_writel(tmp, USB_OTG_STAT_CONTROL); } static int ohci_nxp_start(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); int ret; if ((ret = ohci_init(ohci)) < 0) return ret; if ((ret = ohci_run(ohci)) < 0) { dev_err(hcd->self.controller, "can't start\n"); ohci_stop(hcd); return ret; } return 0; } static const struct hc_driver ohci_nxp_hc_driver = { .description = hcd_name, .product_desc = "nxp OHCI", /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, .hcd_priv_size = sizeof(struct ohci_hcd), /* * basic lifecycle operations */ .start = ohci_nxp_start, .stop = ohci_stop, .shutdown = ohci_shutdown, /* * managing i/o requests and associated device resources */ .urb_enqueue = ohci_urb_enqueue, .urb_dequeue = ohci_urb_dequeue, .endpoint_disable = ohci_endpoint_disable, /* * scheduling support */ .get_frame_number = ohci_get_frame, /* * root hub support */ .hub_status_data = ohci_hub_status_data, .hub_control = ohci_hub_control, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; static int usb_hcd_nxp_probe(struct platform_device *pdev) { struct usb_hcd *hcd = 0; struct ohci_hcd *ohci; const struct hc_driver *driver = &ohci_nxp_hc_driver; struct resource *res; int ret = 0, irq; struct device_node *isp1301_node; if (pdev->dev.of_node) { isp1301_node = of_parse_phandle(pdev->dev.of_node, "transceiver", 0); } else { isp1301_node = NULL; } isp1301_i2c_client = isp1301_get_client(isp1301_node); if (!isp1301_i2c_client) { return -EPROBE_DEFER; } ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (ret) goto fail_disable; dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name); if (usb_disabled()) { dev_err(&pdev->dev, "USB is disabled\n"); ret = -ENODEV; goto fail_disable; } /* Enable AHB slave USB clock, needed for further USB clock control */ __raw_writel(USB_SLAVE_HCLK_EN | PAD_CONTROL_LAST_DRIVEN, USB_CTRL); /* Enable USB PLL */ usb_pll_clk = clk_get(&pdev->dev, "ck_pll5"); if (IS_ERR(usb_pll_clk)) { dev_err(&pdev->dev, "failed to acquire USB PLL\n"); ret = PTR_ERR(usb_pll_clk); goto fail_pll; } ret = clk_enable(usb_pll_clk); if (ret < 0) { dev_err(&pdev->dev, "failed to start USB PLL\n"); goto fail_pllen; } ret = clk_set_rate(usb_pll_clk, 48000); if (ret < 0) { dev_err(&pdev->dev, "failed to set USB clock rate\n"); goto fail_rate; } /* Enable USB device clock */ usb_dev_clk = clk_get(&pdev->dev, "ck_usbd"); if (IS_ERR(usb_dev_clk)) { dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n"); ret = PTR_ERR(usb_dev_clk); goto fail_dev; } ret = clk_enable(usb_dev_clk); if (ret < 0) { dev_err(&pdev->dev, "failed to start USB DEV Clock\n"); goto fail_deven; } /* Enable USB otg clocks */ usb_otg_clk = clk_get(&pdev->dev, "ck_usb_otg"); if (IS_ERR(usb_otg_clk)) { dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n"); ret = PTR_ERR(usb_otg_clk); goto fail_otg; } __raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL); ret = clk_enable(usb_otg_clk); if (ret < 0) { dev_err(&pdev->dev, "failed to start USB DEV Clock\n"); goto fail_otgen; } isp1301_configure(); hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { dev_err(&pdev->dev, "Failed to allocate HC buffer\n"); ret = -ENOMEM; goto fail_hcd; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hcd->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(hcd->regs)) { ret = PTR_ERR(hcd->regs); goto fail_resource; } hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); irq = platform_get_irq(pdev, 0); if (irq < 0) { ret = -ENXIO; goto fail_resource; } nxp_start_hc(); platform_set_drvdata(pdev, hcd); ohci = hcd_to_ohci(hcd); ohci_hcd_init(ohci); dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq); ret = usb_add_hcd(hcd, irq, 0); if (ret == 0) return ret; nxp_stop_hc(); fail_resource: usb_put_hcd(hcd); fail_hcd: clk_disable(usb_otg_clk); fail_otgen: clk_put(usb_otg_clk); fail_otg: clk_disable(usb_dev_clk); fail_deven: clk_put(usb_dev_clk); fail_dev: fail_rate: clk_disable(usb_pll_clk); fail_pllen: clk_put(usb_pll_clk); fail_pll: fail_disable: isp1301_i2c_client = NULL; return ret; } static int usb_hcd_nxp_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_remove_hcd(hcd); nxp_stop_hc(); usb_put_hcd(hcd); clk_disable(usb_pll_clk); clk_put(usb_pll_clk); clk_disable(usb_dev_clk); clk_put(usb_dev_clk); i2c_unregister_device(isp1301_i2c_client); isp1301_i2c_client = NULL; return 0; } /* work with hotplug and coldplug */ MODULE_ALIAS("platform:usb-ohci"); #ifdef CONFIG_OF static const struct of_device_id usb_hcd_nxp_match[] = { { .compatible = "nxp,ohci-nxp" }, {}, }; MODULE_DEVICE_TABLE(of, usb_hcd_nxp_match); #endif static struct platform_driver usb_hcd_nxp_driver = { .driver = { .name = "usb-ohci", .owner = THIS_MODULE, .of_match_table = of_match_ptr(usb_hcd_nxp_match), }, .probe = usb_hcd_nxp_probe, .remove = usb_hcd_nxp_remove, };