/* * drivers/usb/host/ohci-pnx4008.c * * driver for Philips PNX4008 USB Host * * 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 <asm/hardware.h> #include <asm/io.h> #include <asm/mach-types.h> #include <asm/arch/platform.h> #include <asm/arch/irqs.h> #include <asm/arch/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 struct i2c_driver isp1301_driver; struct i2c_client *isp1301_i2c_client; extern int usb_disabled(void); extern int ocpi_enable(void); static struct clk *usb_clk; static int isp1301_probe(struct i2c_adapter *adap); static int isp1301_detach(struct i2c_client *client); static int isp1301_command(struct i2c_client *client, unsigned int cmd, void *arg); static unsigned short normal_i2c[] = { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END }; static unsigned short dummy_i2c_addrlist[] = { I2C_CLIENT_END }; static struct i2c_client_address_data addr_data = { .normal_i2c = normal_i2c, .probe = dummy_i2c_addrlist, .ignore = dummy_i2c_addrlist, }; struct i2c_driver isp1301_driver = { .id = I2C_DRIVERID_I2CDEV, /* Fake Id */ .class = I2C_CLASS_HWMON, .attach_adapter = isp1301_probe, .detach_client = isp1301_detach, .command = isp1301_command }; static int isp1301_attach(struct i2c_adapter *adap, int addr, int kind) { struct i2c_client *c; c = (struct i2c_client *)kzalloc(sizeof(*c), GFP_KERNEL); if (!c) return -ENOMEM; strcpy(c->name, "isp1301"); c->flags = 0; c->addr = addr; c->adapter = adap; c->driver = &isp1301_driver; isp1301_i2c_client = c; return i2c_attach_client(c); } static int isp1301_probe(struct i2c_adapter *adap) { return i2c_probe(adap, &addr_data, isp1301_attach); } static int isp1301_detach(struct i2c_client *client) { i2c_detach_client(client); kfree(isp1301_i2c_client); return 0; } /* No commands defined */ static int isp1301_command(struct i2c_client *client, unsigned int cmd, void *arg) { return 0; } 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 pnx4008_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 pnx4008_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_pnx4008_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_pnx4008_hc_driver = { .description = hcd_name, .product_desc = "pnx4008 OHCI", /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, .hcd_priv_size = sizeof(struct ohci_hcd), /* * basic lifecycle operations */ .start = ohci_pnx4008_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, .hub_irq_enable = ohci_rhsc_enable, #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 pnx4008_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 pnx4008_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_pnx4008_probe(struct platform_device *pdev) { struct usb_hcd *hcd = 0; struct ohci_hcd *ohci; const struct hc_driver *driver = &ohci_pnx4008_hc_driver; int ret = 0, irq; dev_dbg(&pdev->dev, "%s: " DRIVER_INFO " (pnx4008)\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 connect I2C to ISP1301 USB Transceiver"); goto out; } 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, pdev->dev.bus_id); if (!hcd) { err("Failed to allocate HC buffer"); ret = -ENOMEM; goto out3; } /* Set all USB bits in the Start Enable register */ pnx4008_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; } pnx4008_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, IRQF_DISABLED); if (ret == 0) return ret; pnx4008_stop_hc(); out4: pnx4008_unset_usb_bits(); usb_put_hcd(hcd); out3: clk_disable(usb_clk); out2: clk_put(usb_clk); out1: i2c_del_driver(&isp1301_driver); out: return ret; } static int usb_hcd_pnx4008_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_remove_hcd(hcd); pnx4008_stop_hc(); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); pnx4008_unset_usb_bits(); clk_disable(usb_clk); clk_put(usb_clk); i2c_del_driver(&isp1301_driver); platform_set_drvdata(pdev, NULL); return 0; } static struct platform_driver usb_hcd_pnx4008_driver = { .driver = { .name = "usb-ohci", }, .probe = usb_hcd_pnx4008_probe, .remove = usb_hcd_pnx4008_remove, };