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ARM: mmp: add usb device support for PXA910
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Add usb device support for Marvell PXA910.
Actually PXA920 will use the same device.

Signed-off-by: Neil Zhang <zhangwm@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
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Neil Zhang authored and Haojian Zhuang committed May 3, 2012
1 parent 1334d86 commit 75b1bdf
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Showing 6 changed files with 549 additions and 1 deletion.
7 changes: 7 additions & 0 deletions arch/arm/mach-mmp/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -113,4 +113,11 @@ config CPU_MMP2
select CPU_PJ4
help
Select code specific to MMP2. MMP2 is ARMv7 compatible.

config USB_EHCI_MV_U2O
bool "EHCI support for PXA USB OTG controller"
depends on USB_EHCI_MV
help
Enables support for OTG controller which can be switched to host mode.

endif
282 changes: 282 additions & 0 deletions arch/arm/mach-mmp/devices.c
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Original file line number Diff line number Diff line change
Expand Up @@ -9,9 +9,13 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>

#include <asm/irq.h>
#include <mach/irqs.h>
#include <mach/devices.h>
#include <mach/cputype.h>
#include <mach/regs-usb.h>

int __init pxa_register_device(struct pxa_device_desc *desc,
void *data, size_t size)
Expand Down Expand Up @@ -67,3 +71,281 @@ int __init pxa_register_device(struct pxa_device_desc *desc,

return platform_device_add(pdev);
}

#if defined(CONFIG_USB) || defined(CONFIG_USB_GADGET)

/*****************************************************************************
* The registers read/write routines
*****************************************************************************/

static unsigned int u2o_get(void __iomem *base, unsigned int offset)
{
return readl_relaxed(base + offset);
}

static void u2o_set(void __iomem *base, unsigned int offset,
unsigned int value)
{
u32 reg;

reg = readl_relaxed(base + offset);
reg |= value;
writel_relaxed(reg, base + offset);
readl_relaxed(base + offset);
}

static void u2o_clear(void __iomem *base, unsigned int offset,
unsigned int value)
{
u32 reg;

reg = readl_relaxed(base + offset);
reg &= ~value;
writel_relaxed(reg, base + offset);
readl_relaxed(base + offset);
}

static void u2o_write(void __iomem *base, unsigned int offset,
unsigned int value)
{
writel_relaxed(value, base + offset);
readl_relaxed(base + offset);
}

#if defined(CONFIG_USB_MV_UDC) || defined(CONFIG_USB_EHCI_MV)

#if defined(CONFIG_CPU_PXA910)

static DEFINE_MUTEX(phy_lock);
static int phy_init_cnt;

static int usb_phy_init_internal(void __iomem *base)
{
int loops;

pr_info("Init usb phy!!!\n");

/* Initialize the USB PHY power */
if (cpu_is_pxa910()) {
u2o_set(base, UTMI_CTRL, (1<<UTMI_CTRL_INPKT_DELAY_SOF_SHIFT)
| (1<<UTMI_CTRL_PU_REF_SHIFT));
}

u2o_set(base, UTMI_CTRL, 1<<UTMI_CTRL_PLL_PWR_UP_SHIFT);
u2o_set(base, UTMI_CTRL, 1<<UTMI_CTRL_PWR_UP_SHIFT);

/* UTMI_PLL settings */
u2o_clear(base, UTMI_PLL, UTMI_PLL_PLLVDD18_MASK
| UTMI_PLL_PLLVDD12_MASK | UTMI_PLL_PLLCALI12_MASK
| UTMI_PLL_FBDIV_MASK | UTMI_PLL_REFDIV_MASK
| UTMI_PLL_ICP_MASK | UTMI_PLL_KVCO_MASK);

u2o_set(base, UTMI_PLL, 0xee<<UTMI_PLL_FBDIV_SHIFT
| 0xb<<UTMI_PLL_REFDIV_SHIFT | 3<<UTMI_PLL_PLLVDD18_SHIFT
| 3<<UTMI_PLL_PLLVDD12_SHIFT | 3<<UTMI_PLL_PLLCALI12_SHIFT
| 1<<UTMI_PLL_ICP_SHIFT | 3<<UTMI_PLL_KVCO_SHIFT);

/* UTMI_TX */
u2o_clear(base, UTMI_TX, UTMI_TX_REG_EXT_FS_RCAL_EN_MASK
| UTMI_TX_TXVDD12_MASK | UTMI_TX_CK60_PHSEL_MASK
| UTMI_TX_IMPCAL_VTH_MASK | UTMI_TX_REG_EXT_FS_RCAL_MASK
| UTMI_TX_AMP_MASK);
u2o_set(base, UTMI_TX, 3<<UTMI_TX_TXVDD12_SHIFT
| 4<<UTMI_TX_CK60_PHSEL_SHIFT | 4<<UTMI_TX_IMPCAL_VTH_SHIFT
| 8<<UTMI_TX_REG_EXT_FS_RCAL_SHIFT | 3<<UTMI_TX_AMP_SHIFT);

/* UTMI_RX */
u2o_clear(base, UTMI_RX, UTMI_RX_SQ_THRESH_MASK
| UTMI_REG_SQ_LENGTH_MASK);
u2o_set(base, UTMI_RX, 7<<UTMI_RX_SQ_THRESH_SHIFT
| 2<<UTMI_REG_SQ_LENGTH_SHIFT);

/* UTMI_IVREF */
if (cpu_is_pxa168())
/* fixing Microsoft Altair board interface with NEC hub issue -
* Set UTMI_IVREF from 0x4a3 to 0x4bf */
u2o_write(base, UTMI_IVREF, 0x4bf);

/* toggle VCOCAL_START bit of UTMI_PLL */
udelay(200);
u2o_set(base, UTMI_PLL, VCOCAL_START);
udelay(40);
u2o_clear(base, UTMI_PLL, VCOCAL_START);

/* toggle REG_RCAL_START bit of UTMI_TX */
udelay(400);
u2o_set(base, UTMI_TX, REG_RCAL_START);
udelay(40);
u2o_clear(base, UTMI_TX, REG_RCAL_START);
udelay(400);

/* Make sure PHY PLL is ready */
loops = 0;
while ((u2o_get(base, UTMI_PLL) & PLL_READY) == 0) {
mdelay(1);
loops++;
if (loops > 100) {
printk(KERN_WARNING "calibrate timeout, UTMI_PLL %x\n",
u2o_get(base, UTMI_PLL));
break;
}
}

if (cpu_is_pxa168()) {
u2o_set(base, UTMI_RESERVE, 1 << 5);
/* Turn on UTMI PHY OTG extension */
u2o_write(base, UTMI_OTG_ADDON, 1);
}

return 0;
}

static int usb_phy_deinit_internal(void __iomem *base)
{
pr_info("Deinit usb phy!!!\n");

if (cpu_is_pxa168())
u2o_clear(base, UTMI_OTG_ADDON, UTMI_OTG_ADDON_OTG_ON);

u2o_clear(base, UTMI_CTRL, UTMI_CTRL_RXBUF_PDWN);
u2o_clear(base, UTMI_CTRL, UTMI_CTRL_TXBUF_PDWN);
u2o_clear(base, UTMI_CTRL, UTMI_CTRL_USB_CLK_EN);
u2o_clear(base, UTMI_CTRL, 1<<UTMI_CTRL_PWR_UP_SHIFT);
u2o_clear(base, UTMI_CTRL, 1<<UTMI_CTRL_PLL_PWR_UP_SHIFT);

return 0;
}

int pxa_usb_phy_init(void __iomem *phy_reg)
{
mutex_lock(&phy_lock);
if (phy_init_cnt++ == 0)
usb_phy_init_internal(phy_reg);
mutex_unlock(&phy_lock);
return 0;
}

void pxa_usb_phy_deinit(void __iomem *phy_reg)
{
WARN_ON(phy_init_cnt == 0);

mutex_lock(&phy_lock);
if (--phy_init_cnt == 0)
usb_phy_deinit_internal(phy_reg);
mutex_unlock(&phy_lock);
}
#endif
#endif
#endif

#ifdef CONFIG_USB_SUPPORT
static u64 usb_dma_mask = ~(u32)0;

#ifdef CONFIG_USB_MV_UDC
struct resource pxa168_u2o_resources[] = {
/* regbase */
[0] = {
.start = PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
.end = PXA168_U2O_REGBASE + USB_REG_RANGE,
.flags = IORESOURCE_MEM,
.name = "capregs",
},
/* phybase */
[1] = {
.start = PXA168_U2O_PHYBASE,
.end = PXA168_U2O_PHYBASE + USB_PHY_RANGE,
.flags = IORESOURCE_MEM,
.name = "phyregs",
},
[2] = {
.start = IRQ_PXA168_USB1,
.end = IRQ_PXA168_USB1,
.flags = IORESOURCE_IRQ,
},
};

struct platform_device pxa168_device_u2o = {
.name = "mv-udc",
.id = -1,
.resource = pxa168_u2o_resources,
.num_resources = ARRAY_SIZE(pxa168_u2o_resources),
.dev = {
.dma_mask = &usb_dma_mask,
.coherent_dma_mask = 0xffffffff,
}
};
#endif /* CONFIG_USB_MV_UDC */

#ifdef CONFIG_USB_EHCI_MV_U2O
struct resource pxa168_u2oehci_resources[] = {
/* regbase */
[0] = {
.start = PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
.end = PXA168_U2O_REGBASE + USB_REG_RANGE,
.flags = IORESOURCE_MEM,
.name = "capregs",
},
/* phybase */
[1] = {
.start = PXA168_U2O_PHYBASE,
.end = PXA168_U2O_PHYBASE + USB_PHY_RANGE,
.flags = IORESOURCE_MEM,
.name = "phyregs",
},
[2] = {
.start = IRQ_PXA168_USB1,
.end = IRQ_PXA168_USB1,
.flags = IORESOURCE_IRQ,
},
};

struct platform_device pxa168_device_u2oehci = {
.name = "pxa-u2oehci",
.id = -1,
.dev = {
.dma_mask = &usb_dma_mask,
.coherent_dma_mask = 0xffffffff,
},

.num_resources = ARRAY_SIZE(pxa168_u2oehci_resources),
.resource = pxa168_u2oehci_resources,
};
#endif

#if defined(CONFIG_USB_MV_OTG)
struct resource pxa168_u2ootg_resources[] = {
/* regbase */
[0] = {
.start = PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
.end = PXA168_U2O_REGBASE + USB_REG_RANGE,
.flags = IORESOURCE_MEM,
.name = "capregs",
},
/* phybase */
[1] = {
.start = PXA168_U2O_PHYBASE,
.end = PXA168_U2O_PHYBASE + USB_PHY_RANGE,
.flags = IORESOURCE_MEM,
.name = "phyregs",
},
[2] = {
.start = IRQ_PXA168_USB1,
.end = IRQ_PXA168_USB1,
.flags = IORESOURCE_IRQ,
},
};

struct platform_device pxa168_device_u2ootg = {
.name = "mv-otg",
.id = -1,
.dev = {
.dma_mask = &usb_dma_mask,
.coherent_dma_mask = 0xffffffff,
},

.num_resources = ARRAY_SIZE(pxa168_u2ootg_resources),
.resource = pxa168_u2ootg_resources,
};
#endif /* CONFIG_USB_MV_OTG */

#endif
3 changes: 3 additions & 0 deletions arch/arm/mach-mmp/include/mach/devices.h
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Expand Up @@ -50,4 +50,7 @@ struct pxa_device_desc mmp2_device_##_name __initdata = { \
}

extern int pxa_register_device(struct pxa_device_desc *, void *, size_t);
extern int pxa_usb_phy_init(void __iomem *phy_reg);
extern void pxa_usb_phy_deinit(void __iomem *phy_reg);

#endif /* __MACH_DEVICE_H */
3 changes: 3 additions & 0 deletions arch/arm/mach-mmp/include/mach/pxa910.h
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,9 @@ extern struct pxa_device_desc pxa910_device_pwm2;
extern struct pxa_device_desc pxa910_device_pwm3;
extern struct pxa_device_desc pxa910_device_pwm4;
extern struct pxa_device_desc pxa910_device_nand;
extern struct platform_device pxa168_device_u2o;
extern struct platform_device pxa168_device_u2ootg;
extern struct platform_device pxa168_device_u2oehci;

extern struct platform_device pxa910_device_gpio;
extern struct platform_device pxa910_device_rtc;
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