diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-07 13:16:28 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-07 13:16:28 -0800 |
commit | 3e5b08cbbf78bedd316904ab0cf3b27119433ee5 (patch) | |
tree | 0365745c1b7441c1868551c024410c829c3accc6 /drivers/usb/musb/davinci.c | |
parent | da40d036fd716f0efb2917076220814b1e927ae1 (diff) | |
parent | 2af10844eb6ed104f9505bf3a7ba3ceb02264f31 (diff) |
Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (144 commits)
USB: add support for Dream Cheeky DL100B Webmail Notifier (1d34:0004)
USB: serial: ftdi_sio: add support for TIOCSERGETLSR
USB: ehci-mxc: Setup portsc register prior to accessing OTG viewport
USB: atmel_usba_udc: fix freeing irq in usba_udc_remove()
usb: ehci-omap: fix tll channel enable mask
usb: ohci-omap3: fix trivial typo
USB: gadget: ci13xxx: don't assume that PAGE_SIZE is 4096
USB: gadget: ci13xxx: fix complete() callback for no_interrupt rq's
USB: gadget: update ci13xxx to work with g_ether
USB: gadgets: ci13xxx: fix probing of compiled-in gadget drivers
Revert "USB: musb: pm: don't rely fully on clock support"
Revert "USB: musb: blackfin: pm: make it work"
USB: uas: Use GFP_NOIO instead of GFP_KERNEL in I/O submission path
USB: uas: Ensure we only bind to a UAS interface
USB: uas: Rename sense pipe and sense urb to status pipe and status urb
USB: uas: Use kzalloc instead of kmalloc
USB: uas: Fix up the Sense IU
usb: musb: core: kill unneeded #include's
DA8xx: assign name to MUSB IRQ resource
usb: gadget: g_ncm added
...
Manually fix up trivial conflicts in USB Kconfig changes in:
arch/arm/mach-omap2/Kconfig
arch/sh/Kconfig
drivers/usb/Kconfig
drivers/usb/host/ehci-hcd.c
and annoying chip clock data conflicts in:
arch/arm/mach-omap2/clock3xxx_data.c
arch/arm/mach-omap2/clock44xx_data.c
Diffstat (limited to 'drivers/usb/musb/davinci.c')
-rw-r--r-- | drivers/usb/musb/davinci.c | 174 |
1 files changed, 154 insertions, 20 deletions
diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c index 6e67629f50cc..e6de097fb7e8 100644 --- a/drivers/usb/musb/davinci.c +++ b/drivers/usb/musb/davinci.c @@ -30,6 +30,8 @@ #include <linux/clk.h> #include <linux/io.h> #include <linux/gpio.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> #include <mach/hardware.h> #include <mach/memory.h> @@ -51,6 +53,12 @@ #define USB_PHY_CTRL IO_ADDRESS(USBPHY_CTL_PADDR) #define DM355_DEEPSLEEP IO_ADDRESS(DM355_DEEPSLEEP_PADDR) +struct davinci_glue { + struct device *dev; + struct platform_device *musb; + struct clk *clk; +}; + /* REVISIT (PM) we should be able to keep the PHY in low power mode most * of the time (24 MHZ oscillator and PLL off, etc) by setting POWER.D0 * and, when in host mode, autosuspending idle root ports... PHYPLLON @@ -83,7 +91,7 @@ static inline void phy_off(void) static int dma_off = 1; -void musb_platform_enable(struct musb *musb) +static void davinci_musb_enable(struct musb *musb) { u32 tmp, old, val; @@ -116,7 +124,7 @@ void musb_platform_enable(struct musb *musb) /* * Disable the HDRC and flush interrupts */ -void musb_platform_disable(struct musb *musb) +static void davinci_musb_disable(struct musb *musb) { /* because we don't set CTRLR.UINT, "important" to: * - not read/write INTRUSB/INTRUSBE @@ -167,7 +175,7 @@ static void evm_deferred_drvvbus(struct work_struct *ignored) #endif /* EVM */ -static void davinci_source_power(struct musb *musb, int is_on, int immediate) +static void davinci_musb_source_power(struct musb *musb, int is_on, int immediate) { #ifdef CONFIG_MACH_DAVINCI_EVM if (is_on) @@ -190,10 +198,10 @@ static void davinci_source_power(struct musb *musb, int is_on, int immediate) #endif } -static void davinci_set_vbus(struct musb *musb, int is_on) +static void davinci_musb_set_vbus(struct musb *musb, int is_on) { WARN_ON(is_on && is_peripheral_active(musb)); - davinci_source_power(musb, is_on, 0); + davinci_musb_source_power(musb, is_on, 0); } @@ -259,7 +267,7 @@ static void otg_timer(unsigned long _musb) spin_unlock_irqrestore(&musb->lock, flags); } -static irqreturn_t davinci_interrupt(int irq, void *__hci) +static irqreturn_t davinci_musb_interrupt(int irq, void *__hci) { unsigned long flags; irqreturn_t retval = IRQ_NONE; @@ -345,7 +353,7 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci) /* NOTE: this must complete poweron within 100 msec * (OTG_TIME_A_WAIT_VRISE) but we don't check for that. */ - davinci_source_power(musb, drvvbus, 0); + davinci_musb_source_power(musb, drvvbus, 0); DBG(2, "VBUS %s (%s)%s, devctl %02x\n", drvvbus ? "on" : "off", otg_state_string(musb), @@ -370,13 +378,13 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci) return retval; } -int musb_platform_set_mode(struct musb *musb, u8 mode) +static int davinci_musb_set_mode(struct musb *musb, u8 mode) { /* EVM can't do this (right?) */ return -EIO; } -int __init musb_platform_init(struct musb *musb, void *board_data) +static int davinci_musb_init(struct musb *musb) { void __iomem *tibase = musb->ctrl_base; u32 revision; @@ -388,8 +396,6 @@ int __init musb_platform_init(struct musb *musb, void *board_data) musb->mregs += DAVINCI_BASE_OFFSET; - clk_enable(musb->clock); - /* returns zero if e.g. not clocked */ revision = musb_readl(tibase, DAVINCI_USB_VERSION_REG); if (revision == 0) @@ -398,8 +404,7 @@ int __init musb_platform_init(struct musb *musb, void *board_data) if (is_host_enabled(musb)) setup_timer(&otg_workaround, otg_timer, (unsigned long) musb); - musb->board_set_vbus = davinci_set_vbus; - davinci_source_power(musb, 0, 1); + davinci_musb_source_power(musb, 0, 1); /* dm355 EVM swaps D+/D- for signal integrity, and * is clocked from the main 24 MHz crystal. @@ -440,18 +445,16 @@ int __init musb_platform_init(struct musb *musb, void *board_data) revision, __raw_readl(USB_PHY_CTRL), musb_readb(tibase, DAVINCI_USB_CTRL_REG)); - musb->isr = davinci_interrupt; + musb->isr = davinci_musb_interrupt; return 0; fail: - clk_disable(musb->clock); - otg_put_transceiver(musb->xceiv); usb_nop_xceiv_unregister(); return -ENODEV; } -int musb_platform_exit(struct musb *musb) +static int davinci_musb_exit(struct musb *musb) { if (is_host_enabled(musb)) del_timer_sync(&otg_workaround); @@ -465,7 +468,7 @@ int musb_platform_exit(struct musb *musb) __raw_writel(deepsleep, DM355_DEEPSLEEP); } - davinci_source_power(musb, 0 /*off*/, 1); + davinci_musb_source_power(musb, 0 /*off*/, 1); /* delay, to avoid problems with module reload */ if (is_host_enabled(musb) && musb->xceiv->default_a) { @@ -495,10 +498,141 @@ int musb_platform_exit(struct musb *musb) phy_off(); - clk_disable(musb->clock); - otg_put_transceiver(musb->xceiv); usb_nop_xceiv_unregister(); return 0; } + +static const struct musb_platform_ops davinci_ops = { + .init = davinci_musb_init, + .exit = davinci_musb_exit, + + .enable = davinci_musb_enable, + .disable = davinci_musb_disable, + + .set_mode = davinci_musb_set_mode, + + .set_vbus = davinci_musb_set_vbus, +}; + +static u64 davinci_dmamask = DMA_BIT_MASK(32); + +static int __init davinci_probe(struct platform_device *pdev) +{ + struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; + struct platform_device *musb; + struct davinci_glue *glue; + struct clk *clk; + + int ret = -ENOMEM; + + glue = kzalloc(sizeof(*glue), GFP_KERNEL); + if (!glue) { + dev_err(&pdev->dev, "failed to allocate glue context\n"); + goto err0; + } + + musb = platform_device_alloc("musb-hdrc", -1); + if (!musb) { + dev_err(&pdev->dev, "failed to allocate musb device\n"); + goto err1; + } + + clk = clk_get(&pdev->dev, "usb"); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "failed to get clock\n"); + ret = PTR_ERR(clk); + goto err2; + } + + ret = clk_enable(clk); + if (ret) { + dev_err(&pdev->dev, "failed to enable clock\n"); + goto err3; + } + + musb->dev.parent = &pdev->dev; + musb->dev.dma_mask = &davinci_dmamask; + musb->dev.coherent_dma_mask = davinci_dmamask; + + glue->dev = &pdev->dev; + glue->musb = musb; + glue->clk = clk; + + pdata->platform_ops = &davinci_ops; + + platform_set_drvdata(pdev, glue); + + ret = platform_device_add_resources(musb, pdev->resource, + pdev->num_resources); + if (ret) { + dev_err(&pdev->dev, "failed to add resources\n"); + goto err4; + } + + ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); + if (ret) { + dev_err(&pdev->dev, "failed to add platform_data\n"); + goto err4; + } + + ret = platform_device_add(musb); + if (ret) { + dev_err(&pdev->dev, "failed to register musb device\n"); + goto err4; + } + + return 0; + +err4: + clk_disable(clk); + +err3: + clk_put(clk); + +err2: + platform_device_put(musb); + +err1: + kfree(glue); + +err0: + return ret; +} + +static int __exit davinci_remove(struct platform_device *pdev) +{ + struct davinci_glue *glue = platform_get_drvdata(pdev); + + platform_device_del(glue->musb); + platform_device_put(glue->musb); + clk_disable(glue->clk); + clk_put(glue->clk); + kfree(glue); + + return 0; +} + +static struct platform_driver davinci_driver = { + .remove = __exit_p(davinci_remove), + .driver = { + .name = "musb-davinci", + }, +}; + +MODULE_DESCRIPTION("DaVinci MUSB Glue Layer"); +MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); +MODULE_LICENSE("GPL v2"); + +static int __init davinci_init(void) +{ + return platform_driver_probe(&davinci_driver, davinci_probe); +} +subsys_initcall(davinci_init); + +static void __exit davinci_exit(void) +{ + platform_driver_unregister(&davinci_driver); +} +module_exit(davinci_exit); |