532 lines
13 KiB
C
532 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> /* IRQF_DISABLED */
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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 <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/mach-types.h>
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#include <asm/arch/mux.h>
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#include <asm/arch/irqs.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/fpga.h>
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#include <asm/arch/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 <asm/arch/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 void omap_ohci_clock_power(int on)
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{
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if (on) {
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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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}
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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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/*
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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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#ifdef CONFIG_USB_OTG
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static void start_hnp(struct ohci_hcd *ohci)
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{
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const unsigned port = ohci_to_hcd(ohci)->self.otg_port - 1;
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unsigned long flags;
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otg_start_hnp(ohci->transceiver);
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local_irq_save(flags);
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ohci->transceiver->state = OTG_STATE_A_SUSPEND;
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writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
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OTG_CTRL_REG &= ~OTG_A_BUSREQ;
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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 omap_start_hc(struct ohci_hcd *ohci, struct platform_device *pdev)
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{
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struct omap_usb_config *config = pdev->dev.platform_data;
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int need_transceiver = (config->otg != 0);
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int ret;
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dev_dbg(&pdev->dev, "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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if (cpu_is_omap16xx())
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ocpi_enable();
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#ifdef CONFIG_ARCH_OMAP_OTG
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if (need_transceiver) {
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ohci->transceiver = otg_get_transceiver();
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if (ohci->transceiver) {
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int status = otg_set_host(ohci->transceiver,
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&ohci_to_hcd(ohci)->self);
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dev_dbg(&pdev->dev, "init %s transceiver, status %d\n",
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ohci->transceiver->label, status);
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if (status) {
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if (ohci->transceiver)
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put_device(ohci->transceiver->dev);
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return status;
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}
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} else {
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dev_err(&pdev->dev, "can't find transceiver\n");
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return -ENODEV;
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}
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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_omap1510()) {
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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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omap_request_gpio(9);
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omap_set_gpio_direction(9, 1 /* IN */);
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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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distrust_firmware = 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 omap_stop_hc(struct platform_device *pdev)
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{
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dev_dbg(&pdev->dev, "stopping USB Controller\n");
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omap_ohci_clock_power(0);
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}
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/*-------------------------------------------------------------------------*/
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void usb_hcd_omap_remove (struct usb_hcd *, struct platform_device *);
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/* configure so an HC device and id are always provided */
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/* always called with process context; sleeping is OK */
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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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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(0, "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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hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
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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 = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start);
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ohci = hcd_to_ohci(hcd);
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ohci_hcd_init(ohci);
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retval = omap_start_hc(ohci, pdev);
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if (retval < 0)
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goto err2;
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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 err2;
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}
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retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
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if (retval == 0)
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return retval;
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omap_stop_hc(pdev);
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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_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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*/
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void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
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{
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usb_remove_hcd(hcd);
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if (machine_is_omap_osk())
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omap_free_gpio(9);
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omap_stop_hc(pdev);
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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_host_ck);
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}
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/*-------------------------------------------------------------------------*/
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static int __devinit
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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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config = hcd->self.controller->platform_data;
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if (config->otg || config->rwc)
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writel(OHCI_CTRL_RWC, &ohci->regs->control);
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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;
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}
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return 0;
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}
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/*-------------------------------------------------------------------------*/
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static const struct hc_driver ohci_omap_hc_driver = {
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.description = hcd_name,
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.product_desc = "OMAP OHCI",
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.hcd_priv_size = sizeof(struct ohci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ohci_irq,
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.flags = HCD_USB11 | HCD_MEMORY,
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/*
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* basic lifecycle operations
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*/
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.start = ohci_omap_start,
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.stop = ohci_stop,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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/*
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* scheduling support
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*/
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.get_frame_number = ohci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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.start_port_reset = ohci_start_port_reset,
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};
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/*-------------------------------------------------------------------------*/
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static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
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{
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return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
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}
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static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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usb_hcd_omap_remove(hcd, dev);
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if (ohci->transceiver) {
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(void) otg_set_host(ohci->transceiver, 0);
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put_device(ohci->transceiver->dev);
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}
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platform_set_drvdata(dev, NULL);
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return 0;
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}
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/*-------------------------------------------------------------------------*/
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#ifdef CONFIG_PM
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static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
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if (time_before(jiffies, ohci->next_statechange))
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msleep(5);
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ohci->next_statechange = jiffies;
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omap_ohci_clock_power(0);
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ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
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dev->power.power_state = PMSG_SUSPEND;
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return 0;
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}
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static int ohci_omap_resume(struct platform_device *dev)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
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if (time_before(jiffies, ohci->next_statechange))
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msleep(5);
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ohci->next_statechange = jiffies;
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omap_ohci_clock_power(1);
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dev->power.power_state = PMSG_ON;
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usb_hcd_resume_root_hub(dev_get_drvdata(dev));
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return 0;
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}
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#endif
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/*-------------------------------------------------------------------------*/
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/*
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* Driver definition to register with the OMAP bus
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*/
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static struct platform_driver ohci_hcd_omap_driver = {
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.probe = ohci_hcd_omap_drv_probe,
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.remove = ohci_hcd_omap_drv_remove,
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#ifdef CONFIG_PM
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.suspend = ohci_omap_suspend,
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.resume = ohci_omap_resume,
|
|
#endif
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ohci",
|
|
},
|
|
};
|
|
|
|
static int __init ohci_hcd_omap_init (void)
|
|
{
|
|
printk (KERN_DEBUG "%s: " DRIVER_INFO " (OMAP)\n", hcd_name);
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
pr_debug("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
|
|
sizeof (struct ed), sizeof (struct td));
|
|
|
|
return platform_driver_register(&ohci_hcd_omap_driver);
|
|
}
|
|
|
|
static void __exit ohci_hcd_omap_cleanup (void)
|
|
{
|
|
platform_driver_unregister(&ohci_hcd_omap_driver);
|
|
}
|
|
|
|
module_init (ohci_hcd_omap_init);
|
|
module_exit (ohci_hcd_omap_cleanup);
|