| /* |
| * driver for NXP USB Host devices |
| * |
| * Currently supported OHCI host devices: |
| * - Philips PNX4008 |
| * |
| * Authors: Dmitry Chigirev <source@mvista.com> |
| * Vitaly Wool <vitalywool@gmail.com> |
| * |
| * 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 <linux/clk.h> |
| #include <linux/platform_device.h> |
| #include <linux/i2c.h> |
| |
| #include <mach/hardware.h> |
| #include <asm/io.h> |
| |
| #include <mach/platform.h> |
| #include <mach/irqs.h> |
| #include <asm/gpio.h> |
| |
| #define USB_CTRL IO_ADDRESS(PNX4008_PWRMAN_BASE + 0x64) |
| |
| /* USB_CTRL bit defines */ |
| #define USB_SLAVE_HCLK_EN (1 << 24) |
| #define USB_HOST_NEED_CLK_EN (1 << 21) |
| |
| #define USB_OTG_CLK_CTRL IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF4) |
| #define USB_OTG_CLK_STAT IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF8) |
| |
| /* USB_OTG_CLK_CTRL bit defines */ |
| #define AHB_M_CLOCK_ON (1 << 4) |
| #define OTG_CLOCK_ON (1 << 3) |
| #define I2C_CLOCK_ON (1 << 2) |
| #define DEV_CLOCK_ON (1 << 1) |
| #define HOST_CLOCK_ON (1 << 0) |
| |
| #define USB_OTG_STAT_CONTROL IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0x110) |
| |
| /* USB_OTG_STAT_CONTROL bit defines */ |
| #define TRANSPARENT_I2C_EN (1 << 7) |
| #define HOST_EN (1 << 0) |
| |
| /* ISP1301 USB transceiver I2C registers */ |
| #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ |
| |
| #define MC1_SPEED_REG (1 << 0) |
| #define MC1_SUSPEND_REG (1 << 1) |
| #define MC1_DAT_SE0 (1 << 2) |
| #define MC1_TRANSPARENT (1 << 3) |
| #define MC1_BDIS_ACON_EN (1 << 4) |
| #define MC1_OE_INT_EN (1 << 5) |
| #define MC1_UART_EN (1 << 6) |
| #define MC1_MASK 0x7f |
| |
| #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ |
| |
| #define MC2_GLOBAL_PWR_DN (1 << 0) |
| #define MC2_SPD_SUSP_CTRL (1 << 1) |
| #define MC2_BI_DI (1 << 2) |
| #define MC2_TRANSP_BDIR0 (1 << 3) |
| #define MC2_TRANSP_BDIR1 (1 << 4) |
| #define MC2_AUDIO_EN (1 << 5) |
| #define MC2_PSW_EN (1 << 6) |
| #define MC2_EN2V7 (1 << 7) |
| |
| #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ |
| # define OTG1_DP_PULLUP (1 << 0) |
| # define OTG1_DM_PULLUP (1 << 1) |
| # define OTG1_DP_PULLDOWN (1 << 2) |
| # define OTG1_DM_PULLDOWN (1 << 3) |
| # define OTG1_ID_PULLDOWN (1 << 4) |
| # define OTG1_VBUS_DRV (1 << 5) |
| # define OTG1_VBUS_DISCHRG (1 << 6) |
| # define OTG1_VBUS_CHRG (1 << 7) |
| #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ |
| # define OTG_B_SESS_END (1 << 6) |
| # define OTG_B_SESS_VLD (1 << 7) |
| |
| #define ISP1301_I2C_ADDR 0x2C |
| |
| #define ISP1301_I2C_MODE_CONTROL_1 0x4 |
| #define ISP1301_I2C_MODE_CONTROL_2 0x12 |
| #define ISP1301_I2C_OTG_CONTROL_1 0x6 |
| #define ISP1301_I2C_OTG_CONTROL_2 0x10 |
| #define ISP1301_I2C_INTERRUPT_SOURCE 0x8 |
| #define ISP1301_I2C_INTERRUPT_LATCH 0xA |
| #define ISP1301_I2C_INTERRUPT_FALLING 0xC |
| #define ISP1301_I2C_INTERRUPT_RISING 0xE |
| #define ISP1301_I2C_REG_CLEAR_ADDR 1 |
| |
| static struct i2c_driver isp1301_driver; |
| static struct i2c_client *isp1301_i2c_client; |
| |
| extern int usb_disabled(void); |
| extern int ocpi_enable(void); |
| |
| static struct clk *usb_clk; |
| |
| static const unsigned short normal_i2c[] = |
| { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END }; |
| |
| static int isp1301_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| return 0; |
| } |
| |
| static int isp1301_remove(struct i2c_client *client) |
| { |
| return 0; |
| } |
| |
| static const struct i2c_device_id isp1301_id[] = { |
| { "isp1301_nxp", 0 }, |
| { } |
| }; |
| |
| static struct i2c_driver isp1301_driver = { |
| .driver = { |
| .name = "isp1301_nxp", |
| }, |
| .probe = isp1301_probe, |
| .remove = isp1301_remove, |
| .id_table = isp1301_id, |
| }; |
| |
| static void i2c_write(u8 buf, u8 subaddr) |
| { |
| char tmpbuf[2]; |
| |
| tmpbuf[0] = subaddr; /*register number */ |
| tmpbuf[1] = buf; /*register data */ |
| i2c_master_send(isp1301_i2c_client, &tmpbuf[0], 2); |
| } |
| |
| static void isp1301_configure(void) |
| { |
| /* PNX4008 only supports DAT_SE0 USB mode */ |
| /* PNX4008 R2A requires setting the MAX603 to output 3.6V */ |
| /* Power up externel charge-pump */ |
| |
| i2c_write(MC1_DAT_SE0 | MC1_SPEED_REG, ISP1301_I2C_MODE_CONTROL_1); |
| i2c_write(~(MC1_DAT_SE0 | MC1_SPEED_REG), |
| ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR); |
| i2c_write(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL, |
| ISP1301_I2C_MODE_CONTROL_2); |
| i2c_write(~(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL), |
| ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR); |
| i2c_write(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN, |
| ISP1301_I2C_OTG_CONTROL_1); |
| i2c_write(~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN), |
| ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR); |
| i2c_write(0xFF, |
| ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR); |
| i2c_write(0xFF, |
| ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR); |
| i2c_write(0xFF, |
| ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR); |
| |
| } |
| |
| static inline void isp1301_vbus_on(void) |
| { |
| i2c_write(OTG1_VBUS_DRV, ISP1301_I2C_OTG_CONTROL_1); |
| } |
| |
| static inline void isp1301_vbus_off(void) |
| { |
| i2c_write(OTG1_VBUS_DRV, |
| ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR); |
| } |
| |
| 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 __devinit 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, |
| }; |
| |
| #define USB_CLOCK_MASK (AHB_M_CLOCK_ON| OTG_CLOCK_ON | HOST_CLOCK_ON | I2C_CLOCK_ON) |
| |
| static void nxp_set_usb_bits(void) |
| { |
| start_int_set_falling_edge(SE_USB_OTG_ATX_INT_N); |
| start_int_ack(SE_USB_OTG_ATX_INT_N); |
| start_int_umask(SE_USB_OTG_ATX_INT_N); |
| |
| start_int_set_rising_edge(SE_USB_OTG_TIMER_INT); |
| start_int_ack(SE_USB_OTG_TIMER_INT); |
| start_int_umask(SE_USB_OTG_TIMER_INT); |
| |
| start_int_set_rising_edge(SE_USB_I2C_INT); |
| start_int_ack(SE_USB_I2C_INT); |
| start_int_umask(SE_USB_I2C_INT); |
| |
| start_int_set_rising_edge(SE_USB_INT); |
| start_int_ack(SE_USB_INT); |
| start_int_umask(SE_USB_INT); |
| |
| start_int_set_rising_edge(SE_USB_NEED_CLK_INT); |
| start_int_ack(SE_USB_NEED_CLK_INT); |
| start_int_umask(SE_USB_NEED_CLK_INT); |
| |
| start_int_set_rising_edge(SE_USB_AHB_NEED_CLK_INT); |
| start_int_ack(SE_USB_AHB_NEED_CLK_INT); |
| start_int_umask(SE_USB_AHB_NEED_CLK_INT); |
| } |
| |
| static void nxp_unset_usb_bits(void) |
| { |
| start_int_mask(SE_USB_OTG_ATX_INT_N); |
| start_int_mask(SE_USB_OTG_TIMER_INT); |
| start_int_mask(SE_USB_I2C_INT); |
| start_int_mask(SE_USB_INT); |
| start_int_mask(SE_USB_NEED_CLK_INT); |
| start_int_mask(SE_USB_AHB_NEED_CLK_INT); |
| } |
| |
| static int __devinit 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 i2c_adapter *i2c_adap; |
| struct i2c_board_info i2c_info; |
| |
| int ret = 0, irq; |
| |
| dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name); |
| if (usb_disabled()) { |
| err("USB is disabled"); |
| ret = -ENODEV; |
| goto out; |
| } |
| |
| if (pdev->num_resources != 2 |
| || pdev->resource[0].flags != IORESOURCE_MEM |
| || pdev->resource[1].flags != IORESOURCE_IRQ) { |
| err("Invalid resource configuration"); |
| ret = -ENODEV; |
| goto out; |
| } |
| |
| /* Enable AHB slave USB clock, needed for further USB clock control */ |
| __raw_writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL); |
| |
| ret = i2c_add_driver(&isp1301_driver); |
| if (ret < 0) { |
| err("failed to add ISP1301 driver"); |
| goto out; |
| } |
| i2c_adap = i2c_get_adapter(2); |
| memset(&i2c_info, 0, sizeof(struct i2c_board_info)); |
| strlcpy(i2c_info.type, "isp1301_nxp", I2C_NAME_SIZE); |
| isp1301_i2c_client = i2c_new_probed_device(i2c_adap, &i2c_info, |
| normal_i2c, NULL); |
| i2c_put_adapter(i2c_adap); |
| if (!isp1301_i2c_client) { |
| err("failed to connect I2C to ISP1301 USB Transceiver"); |
| ret = -ENODEV; |
| goto out_i2c_driver; |
| } |
| |
| isp1301_configure(); |
| |
| /* Enable USB PLL */ |
| usb_clk = clk_get(&pdev->dev, "ck_pll5"); |
| if (IS_ERR(usb_clk)) { |
| err("failed to acquire USB PLL"); |
| ret = PTR_ERR(usb_clk); |
| goto out1; |
| } |
| |
| ret = clk_enable(usb_clk); |
| if (ret < 0) { |
| err("failed to start USB PLL"); |
| goto out2; |
| } |
| |
| ret = clk_set_rate(usb_clk, 48000); |
| if (ret < 0) { |
| err("failed to set USB clock rate"); |
| goto out3; |
| } |
| |
| __raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL); |
| |
| /* Set to enable all needed USB clocks */ |
| __raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL); |
| |
| while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) != |
| USB_CLOCK_MASK) ; |
| |
| hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev)); |
| if (!hcd) { |
| err("Failed to allocate HC buffer"); |
| ret = -ENOMEM; |
| goto out3; |
| } |
| |
| /* Set all USB bits in the Start Enable register */ |
| nxp_set_usb_bits(); |
| |
| hcd->rsrc_start = pdev->resource[0].start; |
| hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; |
| if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| dev_dbg(&pdev->dev, "request_mem_region failed\n"); |
| ret = -ENOMEM; |
| goto out4; |
| } |
| hcd->regs = (void __iomem *)pdev->resource[0].start; |
| |
| irq = platform_get_irq(pdev, 0); |
| if (irq < 0) { |
| ret = -ENXIO; |
| goto out4; |
| } |
| |
| 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(); |
| out4: |
| nxp_unset_usb_bits(); |
| usb_put_hcd(hcd); |
| out3: |
| clk_disable(usb_clk); |
| out2: |
| clk_put(usb_clk); |
| out1: |
| i2c_unregister_device(isp1301_i2c_client); |
| isp1301_i2c_client = NULL; |
| out_i2c_driver: |
| i2c_del_driver(&isp1301_driver); |
| out: |
| 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(); |
| release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| usb_put_hcd(hcd); |
| nxp_unset_usb_bits(); |
| clk_disable(usb_clk); |
| clk_put(usb_clk); |
| i2c_unregister_device(isp1301_i2c_client); |
| isp1301_i2c_client = NULL; |
| i2c_del_driver(&isp1301_driver); |
| |
| platform_set_drvdata(pdev, NULL); |
| |
| return 0; |
| } |
| |
| /* work with hotplug and coldplug */ |
| MODULE_ALIAS("platform:usb-ohci"); |
| |
| static struct platform_driver usb_hcd_nxp_driver = { |
| .driver = { |
| .name = "usb-ohci", |
| .owner = THIS_MODULE, |
| }, |
| .probe = usb_hcd_nxp_probe, |
| .remove = usb_hcd_nxp_remove, |
| }; |
| |