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ff9cce8277
We are starting to support multiple USB phys as we should thanks for Kishon's work. DeviceTree support for USB PHYs won't come until discussion with DeviceTree maintainer is finished. Together with that series, we have one fix for twl4030 which missed a IRQF_ONESHOT annotation when requesting a threaded IRQ without a top half handler, and removal of an unused variable compilation warning to isp1301_omap. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJP8VcOAAoJEIaOsuA1yqREeNYQAIxHOteF78nx5gMwB20agndf vYCOB3Jymc67vcLuEf60lqoVBuQ7bxGsJyx+HlNkKrVQQfF8enL9UBhUDwvmKytm Z1FBVmuA33PxS2aGSODkgafODO6wfnp5USzzYjEG+Hu6Q9Zt4rJ3NYakYFXdbrM3 kT3uZ2uwuOd/B1Pzt8oiMSbiF16kLeX0a6m6C4KEFViX0uGHAe/KqN4b9eSbO41q 16fvfthbAaqqSpEoMusI+kCFLku7ib3CXl5d4kgik7C7+wY08JTDWhWBMIl6wiFz LeDIXfoX0MgEcB3vDszGCf2pgtCNR8rfl/pzuLvr6F6p+Cj6CqtgsfV8HCe43Dzr RI7Fewl1xdz6MztKRBgr75RxqZ6VA91gLWT21nDI72DEBwyBJ1pk882CxkxSLK+b VNtI/La9JZkUqb0PXioD0a4JUVpzw5nLatpw1PXZoLUgSozVXmhDE6Wjhl/jvl4y ZVQVRQn2ZcyNzYY9bG2X08zyDRRvurXFfQ20CfAeBpgvvfccN9e5vGdWVbohwZro Vn1x+fSyb6KqVOeYlzpAKf+UGXE9UM53YKpjFnmrstqUjbL5ByW2pZn5fYgJP08v 9im3SXwvs3Iz2mzwenRFUpI6PDuaTnIWgB7qquFDY1QwFyAKoPJuVN81/iPCisUM bIYQILhqgTNNjsnPmpCr =HwsA -----END PGP SIGNATURE----- Merge tag 'xceiv-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next usb: phy: patches for v3.6 merge window We are starting to support multiple USB phys as we should thanks for Kishon's work. DeviceTree support for USB PHYs won't come until discussion with DeviceTree maintainer is finished. Together with that series, we have one fix for twl4030 which missed a IRQF_ONESHOT annotation when requesting a threaded IRQ without a top half handler, and removal of an unused variable compilation warning to isp1301_omap.
560 lines
13 KiB
C
560 lines
13 KiB
C
/*
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* OHCI HCD (Host Controller Driver) for USB.
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*
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* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
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* (C) Copyright 2000-2005 David Brownell
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* (C) Copyright 2002 Hewlett-Packard Company
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*
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* OMAP Bus Glue
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*
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* Modified for OMAP by Tony Lindgren <tony@atomide.com>
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* Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
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* and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
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*
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* This file is licenced under the GPL.
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*/
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#include <linux/signal.h>
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#include <linux/jiffies.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <mach/hardware.h>
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#include <asm/io.h>
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#include <asm/mach-types.h>
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#include <plat/mux.h>
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#include <mach/irqs.h>
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#include <plat/fpga.h>
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#include <plat/usb.h>
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/* OMAP-1510 OHCI has its own MMU for DMA */
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#define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
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#define OMAP1510_LB_CLOCK_DIV 0xfffec10c
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#define OMAP1510_LB_MMU_CTL 0xfffec208
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#define OMAP1510_LB_MMU_LCK 0xfffec224
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#define OMAP1510_LB_MMU_LD_TLB 0xfffec228
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#define OMAP1510_LB_MMU_CAM_H 0xfffec22c
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#define OMAP1510_LB_MMU_CAM_L 0xfffec230
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#define OMAP1510_LB_MMU_RAM_H 0xfffec234
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#define OMAP1510_LB_MMU_RAM_L 0xfffec238
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#ifndef CONFIG_ARCH_OMAP
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#error "This file is OMAP bus glue. CONFIG_OMAP must be defined."
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#endif
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#ifdef CONFIG_TPS65010
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#include <linux/i2c/tps65010.h>
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#else
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#define LOW 0
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#define HIGH 1
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#define GPIO1 1
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static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
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{
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return 0;
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}
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#endif
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extern int usb_disabled(void);
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extern int ocpi_enable(void);
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static struct clk *usb_host_ck;
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static struct clk *usb_dc_ck;
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static int host_enabled;
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static int host_initialized;
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static void omap_ohci_clock_power(int on)
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{
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if (on) {
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clk_enable(usb_dc_ck);
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clk_enable(usb_host_ck);
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/* guesstimate for T5 == 1x 32K clock + APLL lock time */
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udelay(100);
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} else {
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clk_disable(usb_host_ck);
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clk_disable(usb_dc_ck);
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}
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}
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/*
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* Board specific gang-switched transceiver power on/off.
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* NOTE: OSK supplies power from DC, not battery.
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*/
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static int omap_ohci_transceiver_power(int on)
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{
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if (on) {
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if (machine_is_omap_innovator() && cpu_is_omap1510())
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fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
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| ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
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INNOVATOR_FPGA_CAM_USB_CONTROL);
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else if (machine_is_omap_osk())
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tps65010_set_gpio_out_value(GPIO1, LOW);
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} else {
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if (machine_is_omap_innovator() && cpu_is_omap1510())
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fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
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& ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
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INNOVATOR_FPGA_CAM_USB_CONTROL);
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else if (machine_is_omap_osk())
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tps65010_set_gpio_out_value(GPIO1, HIGH);
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}
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return 0;
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}
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#ifdef CONFIG_ARCH_OMAP15XX
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/*
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* OMAP-1510 specific Local Bus clock on/off
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*/
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static int omap_1510_local_bus_power(int on)
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{
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if (on) {
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omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
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udelay(200);
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} else {
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omap_writel(0, OMAP1510_LB_MMU_CTL);
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}
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return 0;
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}
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/*
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* OMAP-1510 specific Local Bus initialization
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* NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
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* See also arch/mach-omap/memory.h for __virt_to_dma() and
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* __dma_to_virt() which need to match with the physical
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* Local Bus address below.
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*/
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static int omap_1510_local_bus_init(void)
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{
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unsigned int tlb;
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unsigned long lbaddr, physaddr;
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omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
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OMAP1510_LB_CLOCK_DIV);
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/* Configure the Local Bus MMU table */
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for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
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lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
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physaddr = tlb * 0x00100000 + PHYS_OFFSET;
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omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
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omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
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OMAP1510_LB_MMU_CAM_L);
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omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
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omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
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omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
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omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
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}
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/* Enable the walking table */
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omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
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udelay(200);
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return 0;
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}
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#else
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#define omap_1510_local_bus_power(x) {}
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#define omap_1510_local_bus_init() {}
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#endif
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#ifdef CONFIG_USB_OTG
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static void start_hnp(struct ohci_hcd *ohci)
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{
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struct usb_hcd *hcd = ohci_to_hcd(ohci);
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const unsigned port = hcd->self.otg_port - 1;
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unsigned long flags;
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u32 l;
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otg_start_hnp(hcd->phy->otg);
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local_irq_save(flags);
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hcd->phy->state = OTG_STATE_A_SUSPEND;
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writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
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l = omap_readl(OTG_CTRL);
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l &= ~OTG_A_BUSREQ;
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omap_writel(l, OTG_CTRL);
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local_irq_restore(flags);
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}
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#endif
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/*-------------------------------------------------------------------------*/
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static int ohci_omap_init(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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struct omap_usb_config *config = hcd->self.controller->platform_data;
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int need_transceiver = (config->otg != 0);
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int ret;
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dev_dbg(hcd->self.controller, "starting USB Controller\n");
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if (config->otg) {
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ohci_to_hcd(ohci)->self.otg_port = config->otg;
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/* default/minimum OTG power budget: 8 mA */
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ohci_to_hcd(ohci)->power_budget = 8;
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}
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/* boards can use OTG transceivers in non-OTG modes */
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need_transceiver = need_transceiver
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|| machine_is_omap_h2() || machine_is_omap_h3();
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/* XXX OMAP16xx only */
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if (config->ocpi_enable)
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config->ocpi_enable();
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#ifdef CONFIG_USB_OTG
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if (need_transceiver) {
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hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
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if (!IS_ERR_OR_NULL(hcd->phy)) {
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int status = otg_set_host(hcd->phy->otg,
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&ohci_to_hcd(ohci)->self);
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dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
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hcd->phy->label, status);
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if (status) {
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usb_put_phy(hcd->phy);
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return status;
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}
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} else {
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dev_err(hcd->self.controller, "can't find phy\n");
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return -ENODEV;
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}
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ohci->start_hnp = start_hnp;
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}
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#endif
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omap_ohci_clock_power(1);
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if (cpu_is_omap15xx()) {
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omap_1510_local_bus_power(1);
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omap_1510_local_bus_init();
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}
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if ((ret = ohci_init(ohci)) < 0)
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return ret;
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/* board-specific power switching and overcurrent support */
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if (machine_is_omap_osk() || machine_is_omap_innovator()) {
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u32 rh = roothub_a (ohci);
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/* power switching (ganged by default) */
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rh &= ~RH_A_NPS;
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/* TPS2045 switch for internal transceiver (port 1) */
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if (machine_is_omap_osk()) {
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ohci_to_hcd(ohci)->power_budget = 250;
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rh &= ~RH_A_NOCP;
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/* gpio9 for overcurrent detction */
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omap_cfg_reg(W8_1610_GPIO9);
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gpio_request(9, "OHCI overcurrent");
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gpio_direction_input(9);
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/* for paranoia's sake: disable USB.PUEN */
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omap_cfg_reg(W4_USB_HIGHZ);
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}
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ohci_writel(ohci, rh, &ohci->regs->roothub.a);
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ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
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} else if (machine_is_nokia770()) {
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/* We require a self-powered hub, which should have
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* plenty of power. */
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ohci_to_hcd(ohci)->power_budget = 0;
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}
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/* FIXME khubd hub requests should manage power switching */
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omap_ohci_transceiver_power(1);
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/* board init will have already handled HMC and mux setup.
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* any external transceiver should already be initialized
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* too, so all configured ports use the right signaling now.
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*/
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return 0;
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}
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static void ohci_omap_stop(struct usb_hcd *hcd)
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{
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dev_dbg(hcd->self.controller, "stopping USB Controller\n");
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ohci_stop(hcd);
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omap_ohci_clock_power(0);
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}
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/*-------------------------------------------------------------------------*/
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/**
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* usb_hcd_omap_probe - initialize OMAP-based HCDs
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* Context: !in_interrupt()
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*
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* Allocates basic resources for this USB host controller, and
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* then invokes the start() method for the HCD associated with it
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* through the hotplug entry's driver_data.
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*/
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static int usb_hcd_omap_probe (const struct hc_driver *driver,
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struct platform_device *pdev)
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{
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int retval, irq;
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struct usb_hcd *hcd = 0;
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struct ohci_hcd *ohci;
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if (pdev->num_resources != 2) {
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printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
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pdev->num_resources);
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return -ENODEV;
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}
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if (pdev->resource[0].flags != IORESOURCE_MEM
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|| pdev->resource[1].flags != IORESOURCE_IRQ) {
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printk(KERN_ERR "hcd probe: invalid resource type\n");
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return -ENODEV;
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}
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usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
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if (IS_ERR(usb_host_ck))
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return PTR_ERR(usb_host_ck);
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if (!cpu_is_omap15xx())
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usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
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else
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usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
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if (IS_ERR(usb_dc_ck)) {
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clk_put(usb_host_ck);
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return PTR_ERR(usb_dc_ck);
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}
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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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retval = -ENOMEM;
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goto err0;
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}
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hcd->rsrc_start = pdev->resource[0].start;
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hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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dev_dbg(&pdev->dev, "request_mem_region failed\n");
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retval = -EBUSY;
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goto err1;
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}
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hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (!hcd->regs) {
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dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
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retval = -ENOMEM;
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goto err2;
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}
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ohci = hcd_to_ohci(hcd);
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ohci_hcd_init(ohci);
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host_initialized = 0;
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host_enabled = 1;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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retval = -ENXIO;
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goto err3;
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}
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retval = usb_add_hcd(hcd, irq, 0);
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if (retval)
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goto err3;
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host_initialized = 1;
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if (!host_enabled)
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omap_ohci_clock_power(0);
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return 0;
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err3:
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iounmap(hcd->regs);
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err2:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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err1:
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usb_put_hcd(hcd);
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err0:
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clk_put(usb_dc_ck);
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clk_put(usb_host_ck);
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return retval;
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}
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/* may be called with controller, bus, and devices active */
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/**
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* usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
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* @dev: USB Host Controller being removed
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* Context: !in_interrupt()
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*
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* Reverses the effect of usb_hcd_omap_probe(), first invoking
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* the HCD's stop() method. It is always called from a thread
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* context, normally "rmmod", "apmd", or something similar.
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*/
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static inline void
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usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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usb_remove_hcd(hcd);
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if (!IS_ERR_OR_NULL(hcd->phy)) {
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(void) otg_set_host(hcd->phy->otg, 0);
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usb_put_phy(hcd->phy);
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}
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if (machine_is_omap_osk())
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gpio_free(9);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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clk_put(usb_dc_ck);
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clk_put(usb_host_ck);
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}
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/*-------------------------------------------------------------------------*/
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static int
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ohci_omap_start (struct usb_hcd *hcd)
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{
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struct omap_usb_config *config;
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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int ret;
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if (!host_enabled)
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return 0;
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config = hcd->self.controller->platform_data;
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if (config->otg || config->rwc) {
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ohci->hc_control = OHCI_CTRL_RWC;
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writel(OHCI_CTRL_RWC, &ohci->regs->control);
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}
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if ((ret = ohci_run (ohci)) < 0) {
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dev_err(hcd->self.controller, "can't start\n");
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ohci_stop (hcd);
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return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static const struct hc_driver ohci_omap_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "OMAP OHCI",
|
|
.hcd_priv_size = sizeof(struct ohci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ohci_irq,
|
|
.flags = HCD_USB11 | HCD_MEMORY,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.reset = ohci_omap_init,
|
|
.start = ohci_omap_start,
|
|
.stop = ohci_omap_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 ohci_hcd_omap_drv_probe(struct platform_device *dev)
|
|
{
|
|
return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
|
|
}
|
|
|
|
static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
|
|
usb_hcd_omap_remove(hcd, dev);
|
|
platform_set_drvdata(dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
|
|
{
|
|
struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
|
|
|
|
if (time_before(jiffies, ohci->next_statechange))
|
|
msleep(5);
|
|
ohci->next_statechange = jiffies;
|
|
|
|
omap_ohci_clock_power(0);
|
|
return 0;
|
|
}
|
|
|
|
static int ohci_omap_resume(struct platform_device *dev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
|
|
if (time_before(jiffies, ohci->next_statechange))
|
|
msleep(5);
|
|
ohci->next_statechange = jiffies;
|
|
|
|
omap_ohci_clock_power(1);
|
|
ohci_finish_controller_resume(hcd);
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* Driver definition to register with the OMAP bus
|
|
*/
|
|
static struct platform_driver ohci_hcd_omap_driver = {
|
|
.probe = ohci_hcd_omap_drv_probe,
|
|
.remove = ohci_hcd_omap_drv_remove,
|
|
.shutdown = usb_hcd_platform_shutdown,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ohci_omap_suspend,
|
|
.resume = ohci_omap_resume,
|
|
#endif
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ohci",
|
|
},
|
|
};
|
|
|
|
MODULE_ALIAS("platform:ohci");
|