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291 lines
7.4 KiB
291 lines
7.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* driver for NXP USB Host devices |
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* |
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* Currently supported OHCI host devices: |
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* - NXP LPC32xx |
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* |
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* Authors: Dmitry Chigirev <[email protected]> |
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* Vitaly Wool <[email protected]> |
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* |
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* register initialization is based on code examples provided by Philips |
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* Copyright (c) 2005 Koninklijke Philips Electronics N.V. |
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* |
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* NOTE: This driver does not have suspend/resume functionality |
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* This driver is intended for engineering development purposes only |
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* |
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* 2005-2006 (c) MontaVista Software, Inc. |
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*/ |
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#include <linux/clk.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/io.h> |
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#include <linux/i2c.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/platform_device.h> |
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#include <linux/usb/isp1301.h> |
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#include <linux/usb.h> |
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#include <linux/usb/hcd.h> |
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#include "ohci.h" |
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#define USB_CONFIG_BASE 0x31020000 |
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/* USB_OTG_STAT_CONTROL bit defines */ |
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#define TRANSPARENT_I2C_EN (1 << 7) |
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#define HOST_EN (1 << 0) |
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/* On LPC32xx, those are undefined */ |
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#ifndef start_int_set_falling_edge |
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#define start_int_set_falling_edge(irq) |
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#define start_int_set_rising_edge(irq) |
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#define start_int_ack(irq) |
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#define start_int_mask(irq) |
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#define start_int_umask(irq) |
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#endif |
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#define DRIVER_DESC "OHCI NXP driver" |
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static const char hcd_name[] = "ohci-nxp"; |
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static struct hc_driver __read_mostly ohci_nxp_hc_driver; |
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static struct i2c_client *isp1301_i2c_client; |
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static struct clk *usb_host_clk; |
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static void isp1301_configure_lpc32xx(void) |
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{ |
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/* LPC32XX only supports DAT_SE0 USB mode */ |
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/* This sequence is important */ |
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/* Disable transparent UART mode first */ |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), |
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MC1_UART_EN); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), |
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~MC1_SPEED_REG); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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(ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR), |
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~0); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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ISP1301_I2C_MODE_CONTROL_2, |
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(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL)); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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ISP1301_I2C_OTG_CONTROL_1, |
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(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), |
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(OTG1_DM_PULLUP | OTG1_DP_PULLUP)); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, |
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~0); |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); |
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printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n", |
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i2c_smbus_read_word_data(isp1301_i2c_client, 0x00)); |
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printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n", |
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i2c_smbus_read_word_data(isp1301_i2c_client, 0x02)); |
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printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n", |
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i2c_smbus_read_word_data(isp1301_i2c_client, 0x14)); |
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} |
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static void isp1301_configure(void) |
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{ |
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isp1301_configure_lpc32xx(); |
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} |
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static inline void isp1301_vbus_on(void) |
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{ |
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i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1, |
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OTG1_VBUS_DRV); |
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} |
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static inline void isp1301_vbus_off(void) |
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{ |
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i2c_smbus_write_byte_data(isp1301_i2c_client, |
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ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, |
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OTG1_VBUS_DRV); |
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} |
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static void ohci_nxp_start_hc(void) |
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{ |
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void __iomem *usb_otg_stat_control = ioremap(USB_CONFIG_BASE + 0x110, 4); |
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unsigned long tmp; |
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if (WARN_ON(!usb_otg_stat_control)) |
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return; |
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tmp = __raw_readl(usb_otg_stat_control) | HOST_EN; |
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__raw_writel(tmp, usb_otg_stat_control); |
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isp1301_vbus_on(); |
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iounmap(usb_otg_stat_control); |
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} |
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static void ohci_nxp_stop_hc(void) |
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{ |
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void __iomem *usb_otg_stat_control = ioremap(USB_CONFIG_BASE + 0x110, 4); |
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unsigned long tmp; |
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if (WARN_ON(!usb_otg_stat_control)) |
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return; |
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isp1301_vbus_off(); |
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tmp = __raw_readl(usb_otg_stat_control) & ~HOST_EN; |
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__raw_writel(tmp, usb_otg_stat_control); |
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iounmap(usb_otg_stat_control); |
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} |
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static int ohci_hcd_nxp_probe(struct platform_device *pdev) |
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{ |
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struct usb_hcd *hcd = NULL; |
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const struct hc_driver *driver = &ohci_nxp_hc_driver; |
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struct resource *res; |
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int ret = 0, irq; |
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struct device_node *isp1301_node; |
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if (pdev->dev.of_node) { |
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isp1301_node = of_parse_phandle(pdev->dev.of_node, |
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"transceiver", 0); |
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} else { |
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isp1301_node = NULL; |
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} |
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isp1301_i2c_client = isp1301_get_client(isp1301_node); |
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if (!isp1301_i2c_client) |
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return -EPROBE_DEFER; |
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ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
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if (ret) |
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goto fail_disable; |
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dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name); |
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if (usb_disabled()) { |
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dev_err(&pdev->dev, "USB is disabled\n"); |
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ret = -ENODEV; |
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goto fail_disable; |
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} |
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/* Enable USB host clock */ |
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usb_host_clk = devm_clk_get(&pdev->dev, NULL); |
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if (IS_ERR(usb_host_clk)) { |
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dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n"); |
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ret = PTR_ERR(usb_host_clk); |
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goto fail_disable; |
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} |
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ret = clk_prepare_enable(usb_host_clk); |
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if (ret < 0) { |
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dev_err(&pdev->dev, "failed to start USB OHCI clock\n"); |
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goto fail_disable; |
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} |
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isp1301_configure(); |
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hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
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if (!hcd) { |
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dev_err(&pdev->dev, "Failed to allocate HC buffer\n"); |
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ret = -ENOMEM; |
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goto fail_hcd; |
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} |
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
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if (IS_ERR(hcd->regs)) { |
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ret = PTR_ERR(hcd->regs); |
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goto fail_resource; |
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} |
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hcd->rsrc_start = res->start; |
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hcd->rsrc_len = resource_size(res); |
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irq = platform_get_irq(pdev, 0); |
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if (irq < 0) { |
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ret = -ENXIO; |
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goto fail_resource; |
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} |
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ohci_nxp_start_hc(); |
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platform_set_drvdata(pdev, hcd); |
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dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq); |
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ret = usb_add_hcd(hcd, irq, 0); |
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if (ret == 0) { |
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device_wakeup_enable(hcd->self.controller); |
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return ret; |
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} |
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ohci_nxp_stop_hc(); |
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fail_resource: |
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usb_put_hcd(hcd); |
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fail_hcd: |
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clk_disable_unprepare(usb_host_clk); |
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fail_disable: |
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isp1301_i2c_client = NULL; |
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return ret; |
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} |
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static int ohci_hcd_nxp_remove(struct platform_device *pdev) |
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{ |
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struct usb_hcd *hcd = platform_get_drvdata(pdev); |
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usb_remove_hcd(hcd); |
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ohci_nxp_stop_hc(); |
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usb_put_hcd(hcd); |
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clk_disable_unprepare(usb_host_clk); |
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isp1301_i2c_client = NULL; |
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return 0; |
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} |
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/* work with hotplug and coldplug */ |
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MODULE_ALIAS("platform:usb-ohci"); |
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#ifdef CONFIG_OF |
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static const struct of_device_id ohci_hcd_nxp_match[] = { |
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{ .compatible = "nxp,ohci-nxp" }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match); |
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#endif |
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static struct platform_driver ohci_hcd_nxp_driver = { |
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.driver = { |
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.name = "usb-ohci", |
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.of_match_table = of_match_ptr(ohci_hcd_nxp_match), |
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}, |
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.probe = ohci_hcd_nxp_probe, |
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.remove = ohci_hcd_nxp_remove, |
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}; |
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static int __init ohci_nxp_init(void) |
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{ |
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if (usb_disabled()) |
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return -ENODEV; |
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pr_info("%s: " DRIVER_DESC "\n", hcd_name); |
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ohci_init_driver(&ohci_nxp_hc_driver, NULL); |
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return platform_driver_register(&ohci_hcd_nxp_driver); |
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} |
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module_init(ohci_nxp_init); |
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static void __exit ohci_nxp_cleanup(void) |
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{ |
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platform_driver_unregister(&ohci_hcd_nxp_driver); |
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} |
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module_exit(ohci_nxp_cleanup); |
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MODULE_DESCRIPTION(DRIVER_DESC); |
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MODULE_LICENSE("GPL v2");
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